I've been having fun with sheep recently. Admittedly, I am Welsh, but I'm talking WoW -- and odd behaviour. While skilling up in Engineering I made several mechanical sheep; I tried making them attack nearby Horde players, who were thankfully laughing too much to retaliate. There's nothing like an angry sheep in the morning to get your blood boiling.
I also wasted valuable minutes of my life repeatedly polymorphing a sheep, just to see what would happen. No prizes for guessing the result! So, what are some of the weirdest things you've found yourself doing in WoW -- with or without farm animals?