If it was a mobile coin game, I experienced this once. I had a gimme to win the match and my opponent had already missed the tying putt. He turns and hits a 3-wood off the green. Ok...I figure he's being a jerk and is just going to waste time and take the maximum strokes. Whatever.
But, before the next shot it sat where you're waiting for the player to hit, however it loaded for maybe five minutes. After it loaded, it went to the disconnect wait screen, then finally loaded the shot. The guy sends a message like, "You still there, ****head? See you in ten minutes." Sure enough, it repeats and takes forever.
At this point, I wasn't going to give him the satisfaction so I let him go through the motions. Eventually after 30 minutes of this, he did forfeit.
I have no clue how he did it, but I imagine it's an effective strategy usually.