I get the sentiment, but that won't hold up. If I overpay $1,000 for a $100 pair of boots it doesn't make the boots more valuable. The cost of the hunt, helicopter, tag, etc. has nothing to do with the objective value of the antlers.
Still the landowner was in the wrong. He should have just gone and talked to the hunters and made sure they were legal and then call a game warden if he thought something was wrong. Instead he went for bullying and intimidation and got caught red handed. I don't want his livelihood destroyed or anything to happen to him beyond the requirements of the law and the law shouldn't be twisted to make more of this than it is. If he can take his punishment and move forward with different behavior then good for him. If his prosecution helps other landowners to learn not to repeat his mistake then good for everyone.