This makes a lot of sense to me. He's basically beaten the game. A lot of us, when we beat the game, go back and find all the secret bobbleheads in Fallout, maybe do an expansion that lets us build a cabin in the Skyrim game world somewhere, or play some "epilogue" story. Other people hit all the natural disaster buttons in SimCity and watch the world burn, or just go try to spend all their gold killing as many innocent gamers on the server as they can.

I think this Griefer theory explains a lot of the antisocial behavior we see out of executives and politicians who have beaten the game of life. We structure the game to make "Sociopath" the character class most likely to reach level 99 and win the game, and then we wonder why there are so many sociopaths using game-winning wealth to grief everyone else.