New update! This one is a large one, but everything is color coded.

A large part of those are old suggestions from Parasprite, but some are fairly recent problems that we've encountered and have now rolled into one.
This should be the last large rule update for quite a while.

Glossary
Post: An image or other content uploaded to e621, on the posts section of the website. Not to be confused with a 'forum post'.
Comment: A textual comment made on a Post, on the posts section of the website, or blips in the blip section]
Forum Thread: A 'thread' of comments on a single subject, on the forums section of the website.
Forum Post: A comment made on a Forum Thread.

Changed the order slightly and hyperlinked the sections so the links can go properly to the e621 or e926 version of the website.

Abuse of Site Tools

• Using any of the site tools, such as Flag for Deletion, ticket reporting system, takedowns, notes, or any other site tool in a fashion that can be construed as disruptive, spamming, or defamatory
• Putting gibberish in any of the description fields
• Repeatedly submitting invalid, incorrect, or unnecessary requests
• Repeatedly submitting username change requests
• Using Unicode in tickets, username changes, or any other use of site tools
• Using any of the site tools to “backseat moderate”
• Reporting forum posts, threads, comments, blips, or any other site media that is older than 6 months

• added blips for bad reporting
• added hyperlink to backseat moderating
• clarified forum posts instead of normal posts
• Removed using unicode in tickets because this has been made obsolete sometime last year

Bestiality

• Creating a post, forum post, or thread that is an inappropriate reference to real-life bestiality, sexual relations, or bodily functions
• Linking or commenting on a website that promotes material that contains inappropriate references to real-life bestiality, sexual relations, or bodily functions
• Linking to explicit, real-life material involving animal genitalia or animals mating

Added linking to explicit bestiality and clarified for real-life genitalia and mating, so fantasy/ drawn stuff is still fine.

Creating Duplicate Forum Threads
Suggested Suspension Length: 3 to 7 days
This category includes:

• Creating forum threads about existing topics less than six months old
• Creating a separate forum thread about an existing topic for further discussion in another forum category
• Creating a separate forum thread about an existing locked topic for further discussion in any forum or site

This is intended to reduce clutter on the website, discouraging users from posting similar or same content in multiple, potentially unrelated, forums or topics. If someone would like to increase visibility of a post for any reason, they can request it from an admin.

Literally deleted this entire section and rolled it into spamming and trolling, so please see below for the actual changes.

Extreme Sexuality / Violence

• Linking to websites that refer to extreme real-life violent sexual activity
• Linking to websites that refer to extreme real-life violence
• Linking to websites that refer to extreme kinks and/or fetishes

Videos of rape, snuff, executions, and similar material all fall under this category.
Linking to generic pornographic material is still fine as long as it doesn't break any other rules.

Clarifications of the intent of the rule so it's easier to understand.

Illegal Activities or Drugs
Suggested Suspension Length: 3 to 7 days
This category includes:

• Forum threads or comments that references to abusing illegal drugs
• Forum threads or comments that references to performing illegal activities

Admitting to partaking in arson, bestiality, kidnapping, manslaughter or other similar serious crimes will lead to the permanent closure of your account.
Being a convicted felon for any of the above crimes may also lead to the permanent closure of your account.

This is intended to make sure we are not promoting drug use or other illegal activities in commentary form. For example it is okay if someone posts a picture of someone shooting up, but it is not okay if someone comments that they like to shoot up. We do not want anyone looking at the comments and thinking drug abuse or other illegal activities areis acceptable (because someone else is doing it). Example: a post where a strung-out character has a needle in their arm (okay) Comment in the post’s thread: Oh wow, that reminds me of me an hour ago! (not okay)

Changed the title so it is in alphabetical order.
Also added that admitting to, or being convicted of, bestiality or other serious crimes anywhere on the page will lead to their permanent removal. Neither do we need to deal with legal implications of people who actively partake in illegal activities (for Arizona/US), nor do we need to endanger our users by allowing known convicted felons to be on our page.

National, Racial, or Ethnic Hatred

• Promoting national, racial, or ethnic hatred
• Creating posts, threads, or comments with recognized national, racial, or ethnic slurs
• Creating posts, threads, or comments with hateful content
• Alluding to symbols of national, racial, or ethnic hatred

This is intended to make sure people aren’t outwardly offending people’s national, racial, or ethnic pride or members of a government. This is something that we need to gauge by intent, not just presentation. There are acceptable forms of art that present shock value, or an unpopular point of view, but where we need to step in is if someone is deliberately being malicious.

This is simply a combination of National Hatred and Racial / Ethnic Hatred because they overlap so much. At the same time this means Racial / Ethnic Hatred as it's own category got axed.
Removed the mention of "or members of the government" because those are better protected under Major Religions, Religious Figures, Political Parties, or Political Figures.
In the wake of renaming this I've also changed the anchor on the rule page from #NationalHatred to just #Hatred.

Posting Unreleased Content / Hacking Data Files

• Showing unreleased content from anyone that has been discovered through unauthorized means
• Showing the results of successful or attempted hacks of the Bad Dragon, Dragonfruit, or e621 servers, websites, or affiliates
• Showing paid content, or creating forum posts or comments that link to content only available through paid subscription services
• Discuss, or display any data not available via public websites
• Quoting, or otherwise referencing, another user who posts illegal/paid content or data

Please note that paid content over 2 years old is acceptable to post if it doesn't break any other rules

Here we clarified forum posts since Posting Abuse covers normal posts and a small clarification that paid content in posts is fine if it doesn't break other rules.

Spamming or Trolling

• Excessively communicating the same phrase, similar phrases, or pure gibberish
• Creating comments, forum posts, or threads for the sole purpose of causing unrest
• Causing disturbances in forum threads or comments, such as picking fights, making off topic posts that ruin the thread, and/or insult other members
• Making non-constructive or derailing forum posts or comments.
• Bragging about saving DNP material, or encouraging others to save it
• Abusing the Flagging for Deletion option, Report system, or other website tools by sending false information or nonsensical messages
• Creating forum threads about existing topics less than six months old
• Creating a separate forum thread about an existing topic for further discussion in another forum category
• Creating a separate forum thread about an existing locked topic for further discussion in any forum or site
• Excessively posting old threads without adding anything to the discussion
• Excessively creating pointless threads like forum games, asking for opinions on site irrelevant themes, asking for free art, etc
• Numbering a thread, IBTL, ITT, TL;DR, or any other fad statements

Added duplicate forum posts category (as outlined above), added necroposting, added the creation of pointless threads, clarifying some stuff, added one acronym.
A new highlight is the spiel about bragging to save DNP stuff and encouraging others to do the same. This was in poor taste before, it's now an actual offense that can get you banned.
Please note: Offering to draw free stuff for people, asking about opinions relevant to the page (furry themes, something related to our posts old and new, etc. is still fine). Don't expect to see too many records for forum spam.

Tagging Abuse / Tagging Vandalism
Suggested Suspension Length: 3 days
This category includes:

• Failure to cite a minimum of 4 tags to an uploaded post
• Adding a tag to a post that is not either clearly visible, or reasonably assumed
• Removing a valid tag, either as part of a dispute/argument, or to place one that is not correct
• Failure to properly set the rating of your upload (https://e621.net/help/ratings)
• Knowingly adding or editing a post source to an incorrect link
• Adding invalid/disruptive tags, or any tags that could be considered as defamatory or spam
• Using Unicode in tags, with the exception of foreign artist/character names

Moved tampering with the sources to tagging abuse, and subsequently removed them from Posting Abuse.

As always please let us know what you think about those changes, and if there is anything we should change or rework!