seems that your club has some issues inforcing frequency control.the sad part about this is there is a new type of flyer that either don't care or do not understand the consequenses of their actions.you may even have recourse thru small claims if you can prove rules violation and that he did turn on his radio after being warned.legal remedies are safer than revenge as you get to go home after court.Good luck and anything is repairable ,given time and money.