I had a little fun with this the other night.
A couple of guildies of mine (all of us are level 60) went over to Northshire Valley. Ok, we are Alliance and you'd think "What's there to do that is "fun" in Northshire Valley as Alliance?".
Well, what we did is we got our rogue friend to gather up as many defias as possible and we asked the low levels to help us kill these. Once they had aggro, he would vanish and all the mobs chased down the low levels and killed them all. Later on, i ran down and grabbed Hogger, kited him to Westfall, gathered about 20 murlocs from Westfall on me and brought them all back to Elwynn. We put in general chat "Everyone come south of Goldshire! This is going to be awesome!" So we got about 10 level 4-6's around me trying to "help". I then died, and the murlocs + Hogger were let loose.
It's safe to say we had a pretty fun time doing this.