I agree with both Fatal, and Muffinz, Kill Stealing is simply a part of Warlocks, It'll happen to you and surely you will do it often, don't be upset when you don't get a kill because you get a nice little thing called an assist, plus you are sure to kill steal that person eventually, But to wrap this up because I'm tired , Kill-stealing is acceptable and simply a part of the game play and strategy in warlocks.