Block bot is a machine that auto bans/kicks people. If you don't like what it does, complain to Ephi about it.
Personally I don't like how Ephi once openly acknowledged that Blockbot's logic for action against chat spam is flawed, in the sense that it will either kick or ban you (I'm not familiar which) if you say the same thing twice with days in between and then literally said he doesn't plan to do anything about it, but whatever.
