Why does YAHOO CHAT allow those filthy bots to operate and advertise in every room?!?

I ask you. Why does Yahoo allow those perverted Bots to troll around every last one of those chat rooms and yet they take away user rooms. You can't go into a single chatroom without being hared, put off and tricked by those bots. Why are there no more User rooms or at least some damn mods room hopping for crying out loud!