Requested feature overview description.
Upvoting/downvoting forum posts, similar to the comments section on image board posts.
Why would it be useful?
Allowing registered users to upvote and downvote forum responses could grant users an easier way to vocalize their support (or lack thereof) for a particular response without having to leave a response of their own. A good thought, comment, or suggestion would presumably be upvoted while destructive or negative responses would likely be downvoted. Basically, forum responses would be treated very much like comments.
What part(s) of the site page(s) are affected?
The e621 forum page and all threads in it.
Updated