Franklin,
With you all the way! As a retired LE Officer (34 yrs.) I have had many similar experiences over those years just different offenses. There is no way the offender didn't know the rules. Todays culture (liberal) seems to feel if you don't have photos it just never happened, forget the other evidence present. With the photos what could the excuse be?
Clip his wings until the point is well taken by him and others present and let the Club know they will loose AMA sanctions should this happen again. Looks like a poor location for that type of flying anyway.