The "let George do it" behavior has been around for as long as I can remember. Our first controline club was founded 1n 1954 and as I recall my father and two others put in and maintained the circles while the other twenty or so would come out on Sundays and complain if they had to wait for more than 15 minutes.
The standing question of how to reign in violators probably will not be solved in anyones lifetime.
First and foremost there is always a question of violation versus not liking what someone is doing or personal interpertation of a vague rule. Don't confuse this with crashing in the pit area or flying over the people on the flight line. Clear cut dangerous action is much different than launching a airplane at 90 degrees to the flight path, taking off in front of a landing aircraft, doing aerobatics while others are flying a racetrack pattern and on and on.
The things that can cause direct personal injury or death should be addressed as they happen by those involved not held back for "club action".
The things that offend, cause personal discomfort, or are blown into huge hypothetical situations have no clear cut methodology for resolution. These things can be discussed ad nauseum and shored up with hundreds of anecdotal solutions but in the end most of these situations are left unresolved as they are replaced by something fresher that has happened.

As for the AMA membership renewal, again, time will determine what happens here. Although I have been a member for years, I have said several times that I consider AMA to be a toothless dog. Past laurels are overshadowed by the question of what have you done for me lately?
Many people are voting with their pocketbooks. There is indication that the AMA has become a self serving organization that is out of touch with what a portion of the current membership and non member flyers really want.