stretching out a bit here i think a chat app, that destroys "offending" content, such as [https://pastebin.com/] could be safe, but if that app allows copy pasta that might be a problem, lets say song lyrics, or movie subtitles, or leaked manuscript, or moviescripts.

Well, FTA, you have to grow your service big first..

If you grow it big and make no money then you're likely have other problems :)

If you grow it big and make money, then you can afford to do a little filtering.

disclaimer: I'm in no way fan of this stuff.. just saying it might be as pointless as the cookie-law.