When is Yahoo going to stop the bots in there chat rooms?

It better be soon if they arent going to bring back the personal rooms. The public rooms make it to easy for obsence number of bots to gather in one place. I think they should be able to control the number of bots that try to sign up or if they are watching like they say they are... why dont they take care of the bots? Granted it seems that i am answering a question with a question but i think this needs to be addressed b y them. I have also been told that is how they keep yahoo chat free..