I golf once or twice a year, always at a best-ball tournament of some kind. I won't say when this happened, but the least fun I ever had was when one of the guys in our foursome decided to keep score, but refused to be honest about just how badly we were playing. He just couldn't stand to see his name at the bottom of the results. I hope never to play with him again.
In sailing, my favorite is when people hit the mark (and know it). If you're DFL with no chance of passing anyone, I'd say keep going so you don't hold up the next start. Otherwise, do your turns and sleep better at night.
Mike