@nobodysuspectsthebutterfly and I have been experimenting with the ban and this is what we know so far:
1) If you are the OP of an incorrectly flagged post, DON’T DELETE IT! Only the OP can request an appeal.
2) If you weren’t able to request a content appeal on your posts before the ban, you (as the OP) should be able to request an appeal now.
3) The appeal process is going VERY FAST now and it is VERY LENIENT on what is allowed. (I mean, this art on my sideblog was immediately restored, and uhhhh I don’t recommend clicking on that if you’re at work.) I’ve requested appeals on about 5 of my posts so far, and I got the approval email for all of them in about two minutes.
4) If you have flagged posts on your blog, some of them are currently “stuck” or out of chronological order on the desktop right popout blog! But you as the owner of the blog may not be able to see this! This is how you get to the popout blog:
On the popout blog, the blog owner / admin will see their posts normally, but your friends visiting the popout blog will see old posts from months/years ago mixed in with more recent posts ( @new-xkit-extension‘s timestamp extension is helpful here). The out of order posts have probably been flagged. (You may not be able to see the flag.) SO!
Ask a friend to look at your desktop right popout blog for the first 10 to 20 posts. Your friend can tell you which posts are out of order or flagged for you to request a content appeal.
5) You may have other flagged posts in addition to the “stuck” ones! This script might help you find other flagged posts on your blog, but it has known bugs and it will not find all of them. As I write this, we currently do not know of a way to find all of your flagged posts on your blog.
6) The best thing to do right now is, if you see an incorrectly flagged post, message the OP to let them know their post was flagged and they can request a content appeal.
7) If you’re an artist or photographer and you think your work isn’t going to be allowed on tumblr anymore, request an appeal anyway! It might be restored! (Seriously, this art on my sideblog was immediately restored, so try an appeal! It works!)
8) If a post is incorrectly flagged, but the OP has deleted their blog, we don’t know if there is a way to appeal the post.
9) Sometimes if you reblog a post that’s flagged you’ll get a notification that it is flagged – contact the OP if so and let them know their post was flagged.
I am writing this post at 3:50AM Eastern Standard Time on 12/17/2018. The information I have listed here may change with time.