The fellows at the informal field are in violation of the AMA safety regulations, flying within 3 miles of an established flying site without a frequency sharing plane. If these fellows are AMA members, then the AMA certainly can withdraw their membership for violation of the safety standard. Since the first club was operational first (I'm inferring this, if I'm wrong then they are in violation of the safety standard), it is the second group's responsibility to seek out a frequency sharing plan. I realize it may be impossible to determine if these guys are AMA members and identify their member IDs. If you could, the AMA has a responsiblilty to warn the AMA members they are in violation of the safety standard. I don't understand Brown's response unless he was saying that without further identification the AMA can do nothing. If he saying that the AMA cannot enforce the safety standard within their limited means (withdrawing membership), then the safety standard doesn't mean puke.
I would love to hear Brown's answer to the above. Either the safety standard has some meat, however thin, or throw it out and stop making such a big deal about it. BTW, I believe the safety standard is a good thing but the AMA has to either support it or drop it.