It would seem that any pacts amongst players with respect to "rules enforcement" would be pretty much limited to "stance violations". Going beyond this (i.e., allowing pact member to move their mini to a better spot, letting an OB shot be deemed IB, etc) would be too hard and the risk (blatant cheaters are frowned on big time) would be much greater than the reward.
So if you think (I say "if" because I personally don't see this as a huge problem) that stance violation is too lax amongst top players, and perhaps selectively enforced, then GB (or others that view this as a problem) should start to "own" enforcement of stance violations within their groups. For example, before the round tell everyone in a good natured way something along the lines of, "Hey guys, I see a lot of us pros getting lax on enforcing stance violations. This is a big tournament so we should all try our best to be "clean". Please don't hesitate to say something or even make a call on me if I am committing a stance violation and I will do the same for you all. I'm not talking about getting out a microscope or being a nit picker, just clear stance violations". So again if you think uncalled stance violations is a problem, I think that it is only "whining" if you are not prepared to be proactive on this issue within your circles of tournament play.
i see it going both ways. this douche from south dakota in the last tourny kept callin foot faults on me. one was literally an inch or less away from a mini. he said i was "kitty corner" from it. another was he thought i had my tip toes on the mini when i was putting. i think you should call them, but he was the only one in the card that seemed to notice. typically the whole card agrees and he was the only one. i think what he noticed more was my comeback and how horrible he was doing on day two. rest assured, my jimmies werent rustled.
you should call people out on their bull ****, but having too many people thinking they saw something and trying to call faults is not fun to be around either. i mean call em as you see em. but no need to go over the top and nit pick but if your clearly committing a foul you need to be called