Rules is rules but how you interpret them is open for discussion. That's the problem with most of the rules I've seen for pulling. One guy says it's OK and the next says no way, it's a trick hitch, no it's OK it goes on and on. Until someone sits down and writes the rules clearly and covers all the bases your are going to have people push the rules into the gray area. Guess what, that's there job!
As for cheating many look at it differently, It's not cheating if you do not get caught. NOS has been hidden for many years in many ways. Those of us that run it do not event try to hide it, not worth the trouble. If it's legal at one event you bet we will use it. Why bring a knife to a gun fight? If it's not legal we remove it, it's just that simple.