In Georgia it is not illegal for someone to shoot a deer on your property but it is illegal to retrieve an animal across property lines without written permission, even if it mortally wounded and you are trailing it. You may want to recheck your game laws. Get some bedsheets and hang them in front of his stands to obstruct his view of your property. This will probably create and issue but it seems like there is already one. Good luck. Whatever you do don't give in to his shootem up strategy - keep letting the little ones walk, at least if you let them go he can live to see another day to grow.