Well, after playing him 129 times in the past 70 days (making him your second-most-frequent opponent of all time), may I suggest that you mark Unga as an enemy?
I have marked Unga as an enemy BTDubs, I've even politely asked him not to join my games. I Probably marked him as an enemy after 10 - 15 games.
In fairness to Royal, he did ask: http://www.wargear.net/games/view/445895
Polite may be a stretch, but he did ask.
Enough