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It's comparable to 8Chan or Gab or Voat - it's a refuge for all the people who have been censored from places like 4Chan or Twitter or Reddit, and it turns out there's a reason why those folks get banned from such sites and when you get them all together in a room, predictable things happen.

(This is one of the few examples of such sites showing technical competence, so I wouldn't put too much stock in their decision to go with Heroku, and I wouldn't worry about your own apps.)

You can be censored from 4Chan? Wow!

It's ironic but 4chan has quite a lot of moderation and bans and is also more pro-actively cooperative with law enforcement than other platforms like reddit, facebook etc. That last point might be why it has continued to survive.

check out the comments, it's racial slurs and swastikas all around

Based on the front page it looks like another place where /r/TheDonald ended up. Except even more radical. So far right wing political including what many would call hate speech, racism, etc.