This is ****ing funny, well at least 'tis for me.
Invite ALOT of people to a raid group, i mean alot. And then kick someone randomly and say "Come to AH bridge instead, then i'll give you 1000g"
And then, once you're group is really filled up, and there's lots of people on AH bridge etc. Say "BRB MY SHOWER IS ON FIRE" or something totally random and kick people randomly and leave the raid once 50% of the people are kicked. This might not sound funny, but trust me, it is.
Try with some other random comments