Can we do something against this bot who is trolling boards since a while?

It's very obvious. Threads gaining 20 upvotes in a few minutes and after that only 1 per 10 minutes or even get only negative votes after that 20 upvotes (because thread is actually just shit post Rant). Same goes for downvoting comments in those threads -20 in a few minutes.

Also it's always the same type of threads/comments.