It works the other way around also. As a healer I get targeted by 98% of the players in whatever Battleground I'm running, and it's always nice to get harassed by a rogue only to have a competent death knight ally yoink the rogue off me and lay down some hurt.

Oddly enough, I have to admit a death knight has never actually killed me without a lot of help. Being a disc priest probably has something to do with my general survivability(though I've never had to use Disc-only spells), but as long as I kept spamming Dispel and Abolish Disease on myself I could effectively kite a DK around while ranged allies killed him off. He couldn't mind freeze me because all I'd use are instants, and without diseases up a lot of their abilities aren't very good.

I also like it when a death knight Death Grips me right into the middle of his ranged/caster allies and I get to fear them all. I call that a LOLgrip.

Lolgrip nice. I was doing it to Druids and shamans mostly and yah you take away a dks diseases and you effectively de-claw them. They're tons of fun to me I have an affinity for dks and paladins, but they are by no means THE class.

I have seen the opposite a lot, too. I have been pulled out of focus fire by a greedy DK a couple of times, and I have seen probably a dozen times where a Flag Carrier is pulled AHEAD of focus fire and down the field by a greedy/dumb DK.

If you're not solo 99.9% of the time it is inappropriate to use death grip. I see dks misuse it every day on instance runs. Just because you can pull with death grip doesn't mean you should.

I was thinking that it would be fun to team a DK with a lock/spriest. Have the DK pull them w/ DG, and then fear them away. Rinse and repeat.

Even more fun, do the same thing for a 5v5 arena team. Have 2 DKs, a lock, & 2 priests. I would suggest doing it to their ranged, so it knocks them out of combat for a little bit.