I just finished deer season. (Got one, by the way, eating it now.). The whole two days before was spent going around to various property owners.
"Is it ok if we hunt on your land?" "Where is the boundary of your land?" "Is there any part of the deer you really like, that we could bring you, if we get one?"
Whether through willful ignorance, or total disregard, guys like these are the reason some people said "No, I'd love to have you hunting on my land, 'cause the deer eat my crops, but I've dealt with too many dirtbags..."
F this guy. He's lucky he didn't get shot. Call game warden, call sheriff, and if you can catch him again... Use whatever force necessary to safely effect a citizen's arrest.
"The nation that makes a great distinction between its scholars and its warriors will have its thinking done by cowards and its fighting done by fools." Thucydides, Greek Historian