For me it's Ice... that sniper guy in that mvp guild. It's like no matter what toon I'm on he always catches me when all of defensive CD"s are up, there's no healer around, etc. I blink, and I'm dead I think I force-pushed him into the fire on huttball once on my guardian a while ago, but outside of that I stay away from him lol
I'd also like to add that dude Winz, Mara. I haven't seen him in months. Is he still around?