If we know somebody is true sandbagger, is there a way to get the USBC to note it so that they will have to bowl scratch at any USBC sanctioned tourny? I know entire teams of sandbaggers, who constantly cash and win tournies due to their sandbagging. I've seen them in leagues when they bowl each other, spend the night trying to pick the big 4 off of full racks, or even against other teams dumping repeated balls in the gutter after winning a game. (These guys would be legit 220+ average bowlers who carry book averages of around 180).
The league they are in tolerates it because they are the league officers.
They are not youngsters who have improved their game, but long time seasoned vets that never bowl more than 18 games in any league but the league where they establish their average.
The local association knows about it, but won't do anything about it.