Well I'm not sure if this has been posted before, so if it was, just delete it please :-)
Now I've found an interesting way to make people leaving in AV
Its pretty useless, but its still fun to see how stupid some people are :P
When you enter Alterac Valley just say in the Battleground Chat "To see who's afk type "/afk list" and report them!" When they type that, they will afk out themself, and get a deserter buf for 15 minutes
Yes, there are actually people who are stupid enough to do this :P