The masskick command allows you to completely empty a room. Everyone, including the person who issued the command if he or she is in the room, will be kicked out. Note: To prevent people from automatically rejoining, ChanServ will join the channel for 2 minutes to enforce a ban of *!*@*.
/msg operserv masskick #webchat abuse
This command is useful to empty a room that has violated network rules. For example, if a room has been advertising itself in annoying ways, a masskick may cause the founder and the channel operators to reconsider their behavior.