Steve2golf:
Scottish call the mulligan three off the tee.
When I first started playing, my buddy was pretty stern about the etiquette of golf..
He gave me a handicap (he was the only guy I played with at the time) and before each round was "Practice round, or game?"
In "game" he explained "What if I let you hit that shot over, and you made your personal best?, would you feel good about it"?...he'd go on to say "if you played that shot, and made a personal best...I know you'd feel good about it"
That said, I feel in a practice round, if WGT has the ability to program it, drop as many balls as you like.