NSFW subreddit purge, many subs have been banned today.

There's been a massive purge of many NSFW or Drug related subreddits today.
This post is for any subreddit purge related discussion, other posts will be removed.

This is a good reminder that nothing is permanent, and that anything that isnt stored within your own control can easily be removed.
Keeping your own backups/archives is a good way to preserve the things you want to keep.

Edit:
Supposedly this was a "bug", reddit admin comment here: - /r/ModSupport/comments/1ii67mt/communities_are_banned_again_for_being_unmoderated/mb3fewv/
Several subs are still banned though.

Edit 2:
This was aparently a problem with an automated tool with no human oversight on the result it gives.
/r/ModSupport/comments/1iie3q9/issue_resolved_subreddit_banned_for_being/