hahaha!
I'd tell them if I saw them about to mess up, and I always tell my opponent if I mess up and they didn't see it. I was raised playing the game of golf, and you always hold yourself accountable to your actions. To each their own though.
Seems the reasoning is a little fuzzy here.
You hold yourself accountable for your actions...but not the other guy?
....do you think you’re better than everybody else?
pt...worked at a pro shop long before he hit a pool ball