Proper thing to do? Hmm would have probably asked him to leave in person.
I would think this would have been effective.

Turning him in...ballsy indeed, and not that you were wrong..but looking over your back, for the next year or so, don't seem worth it. He will most likely make an attempt at getting back at you. Steal your stands in the dark, poach your quality bucks, Throw human scent bombs by your stand on opening day..either way the risk may not be worth the reward of "nailing him"!