Do you think youtube/twitch/... don't face these issues? Have you ever come across a youtube account that said:

BANNED FOR POSTING PORNOGRAPHIC IMAGES ON LIVECODING.TV BANNED FOR POSTING PORNOGRAPHIC IMAGES ON LIVECODING.TV BANNED FOR POSTING PORNOGRAPHIC IMAGES ON LIVECODING.TV

No. They just delete the account. I don't think many people would want to join a website where the CEO vandalizes user profile pages, regardless of the reason.