[fernandotakai]

> extremely rare, and per-sub, not reddit-wide

from your list, it's the only thing it's not correct:

there's a site wide shadow-ban that is only done by admins. that means if you post something, nobody will see but for you everything will show up as normal. subreddit moderators can approve your comment and it will show up. this started as a measure against spammers but it seems like normal users get shadow banned too.

now there's normal ban, where you can be banned from a subreddit (you can't post but you can browse) and there's a reddit-wide ban (your account gets basically deleted).

and there's also AutoModerator "shadow-ban" which makes use of reddit's auto moderator to delete a user's comment as soon as it get posted.