I play Horde on Stalagg. 
I ran into a Warlock today who was 7 levels higher than me, attacked me while I was killing a yeti. Obviously took the death.
The funny thing is, I’d have left him alone if he’d shown me the same courtesy. But, he was there trying to solo the elite ogres. And, well, you know, the enemy of my enemy is my friend.
Thanks, ogres.