I know.. it usually happened by a ****** paladin attacking a low level town.
Usually the Crossroads in the Barrens.
Happening to be nearby sometimes, I'd go over and deal with these guys. In almost every case I would be easily beating them in the fight. They'd just bubble at low health and begin heart, laughing as they go. I'm glad they made it to where they can't do that anymore but.. meh.. I've stopped playing WoW since then.