Might I suggest a way of quieting down an insanely-scrolling room: Set the room's mode to +m where only ops can speak for a minute or so, depending on how crazy it was. This shouldl be used only when craziness erupts, such as (1) excess actions, (2) bot abuse, (3) smilies and spelling corrections abound.
One of the many "crowd control" methods the IRC gestapo can use
One of the many "crowd control" methods the IRC gestapo can use

