If Phil can cheat, why can't Tiger phil-ander?

Phil Mickelson is cheating, and he was called on it by fellow pro Scott McCarron, because Phil's using a wedge with square grooves even though square grooves were just outlawed. (Square grooves help golfers get better spin on the ball.)

But old old clubs (pre-1990) with square grooves are, in fact, technically permitted under a long-ago PGA agreement with Ping, which manufactured the square groove clubs. So by using an old Ping club, Phil is technically not cheating.  But he is violating the spirit of the new rule, which means a lot in golf, because golf is "a gentleman's game," says McCarron.

Hmmm. Is Tiger Woods cheating? Shouldn't he be allowed to get to cheat because in the old days, when blacks weren't allowed in the game, white guys got to run around with the babes and were pretty much undetected because there was  no such thing as a cell phone? Shouldn't Tiger be grandfathered in and allowed to be profligate?