Last week, when my team - Pally+2xShaman+2xMage on PvE Muradin(H) - was killing boars in Hellfire, a couple of 70 allies, mage and priest noticed me. The mage flagged and stood on my boar. I'm not a big fan of PvP, so I was trying to be careful extra careful with my clicking, but somehow I targeted him. I didn't notice I was flagged until a second before the final fireball killed him. His friend then rezzed him, and I killed both of them, but they took one of my shammies with them. I rezzed and hearthed, fearing they might bring the cavalry. Overall, i'm pretty pleased with how that turned out.