Reddit also has shadow-banning, apparently to stop bots and spammers. There are two things wrong with that idea. First, the false-positive rate was too high -

Reddit also has shadow-banning, apparently to stop bots and spammers. There are two things wrong with that idea. First, the false-positive rate was too high - I created more than 10 personal accounts over almost a year, and they were ALL shadow-banned, often after one post. Second, if I was automating spam bots I wouldn't care if one was shadow-banned. It's not hard to automate a test for being banned, so just create a new bot and move on.