You pointed out an accusation, and a legal theory about trespass law and citizen's arrest.
It may well be that the Arizona statute is unconstitutional under Arizona's own constitution, in that it restrains citizens unduly from restoring order in certain situations and requires them to become (you pick) either bystanders or victims of lawbreaking, without effective recourse (there's never a cop around when you need one).
A good lawyer, on the facts presented, could make your "Reality" look like Swiss cheese.