Mod Mark: "... yes, we did hit it, but it was only a small iceberg. There is no way that the Titanic could possibly sink." But seriously, I'm all for McDonald's hiring the mentally challeneged, but I don't think gaming companies should.
Point is this, if it's multi-combat, you deal with it. If you can't compete, then you switch. If you get the kills and beat, him, he'll eventually leave. No one does this on purpose to be a d**k. They simply the time it takes to find another world more than your supposed right to a world you were on first.