I would steal his girlfriend.
All joking aside, I'm with Marx on this one. I wouldn't get too bent out of shape. It's a game, after all. There's always a next time.
However, if he/she wiped/cheated on a regular basis and wasn't getting caught or called on it, I would bring it to the attention of the ref first...team mates next and failing that....
then I would hose 'em down.