A few suggestions for features are:
- Block All Chat Users
It's sometimes really annoying when a bunch of 10-year-olds who somehow have your e-mail address (or one of them was on your contact list) invites you to a chatroom and they're just little chatterboxes and when you leave they invite you back in.
So a command like /chatBlockUsers or something, that would add all the participants of the chatroom to your deny list so you can leave the room peacefully and they can't invite you back in.
- Block Chats Alltogether
Sometimes multiple person conversations can just be annoying, like when you're talking to somebody and they invite their bot in to test commands because they're too lazy to open their own conversation with it. So a command to block all chats, or a function to accept chat invitations (like AIM), so that some chats you might want to join but some you can deny and not join them.
Like... /chatDeny, /chatAllow, /chatRequireInvite... you could probably think of some shorter versions of these commands, or abbreviations...
Those are my suggestions.