What to do with trolls leaving negative comments? Is it really possible to somehow block them all?
There's probably no point in blocking them.
Now there are programs that can create hundreds of accounts in an hour. You can try to block through admins using IP or hardware, and also level them. But in order to level, you yourself will need outside help with hundreds of accounts. You can simply ask subscribers to write down positive reactions.
And read more here https://gyre.pro/blog/how-to-deal-with-trolls-spam-and-negative-comments-on-your-live-streams there are a lot of useful tips on this topic here.