Matt,
Why would being labelled a cheat be a death sentence to a player? You might not get as many endorsement deals and not have many fans, but for almost all tournaments you qualify based on the number of strokes on your card. Whether you're a cheater who gets caught and has strokes added or the occasional DQ, or a cheater who sometimes gets away with it but there isn't sufficient evidence (i.e., only 100 gallery members saw it, but not an official or TV camera) if your card reads the lowest after 72 holes you're a winner. If you do it in a major you get one of those nice trophys or jackets.
Or is there some unwritten rule on the PGA tour that if you get penalized or DQed too many times you get kicked off the tour, standing in the top 125 money winners be damned?