>>3There's no such bot that I'm aware of. There is a bot that people play around with, but I think that's more of a Rizon network bot than just for #4chan. As far as I know a moderator has to be around to see your link to the offending post/thread.
Mentioning their names however does get their attention eventually. Perhaps there should be some kind of bot, but I'm not sure how better things would run if there was one. 4chan is pretty understaffed as it is.