do mobs take drowning damage?

[Chewybunny]

No. Unfortunetly.
However, back in the pvp days, I had a Iksar Shaman that I built faction so Crushbone Orcs wouldn't attack me. I would run around Crushbone pvping, and if I ever got into a problem I'd dive into a little lake there and if they follow me I just root them and drown them. I used to have a screenshot where the bottom of the pit was just a bunch of corpses.