Is Blocked meaning you can still use the site but can't comment or post pics?

it means you can no longer access your account. While logged off, you can still use the site, but you'll have the site's default blacklist and can't do things that require an account, such as commenting, liking/favoriting, managing posts (editing tags, flagging, et cetera), and anything else that says you need an account to do this.

Blocked means that you can't log in.
You can still access the site as a guest, though.

siral_exan said:
you'll have the site's default blacklist

Logged-out users still have access to a blacklist: https://i.imgur.com/x1sWgrV.png

bitwolfy said:
Logged-out users still have access to a blacklist: https://i.imgur.com/x1sWgrV.png

I didn't say they don't have access to a blacklist, just that it defaults you to one. Or, I've logged out before and my blacklist changed due to it... the most commonly blacklisted and complained about tags are on there, though I don't know exactly what tags are there.

siral_exan said:
it means you can no longer access your account. While logged off, you can still use the site, but you'll have the site's default blacklist and can't do things that require an account, such as commenting, liking/favoriting, managing posts (editing tags, flagging, et cetera), and anything else that says you need an account to do this.

how's that any different from a Ban? specifically a Perma-ban.

closetpossum said:
how's that any different from a Ban? specifically a Perma-ban.

There is no difference? It's just terminology, first you get temporarily banned, then blocked permanently.