Let me decipher what was posted here by Butch,,,"I have given you interwebs tuff guy advice based on zero knowledge and personal experience,..
YMMV
That's inaccurate. He said is was (still is?) a L.E.O. with nearly 8 years experience, so if that's true he has some training on criminal law as distinguished from civil causes of action, and he's surely had some experience in landlord-tenant or roommate disputes.
And he's correct that it's UNLIKELY the punkass deadbeat grandkid would try to use the legal system to the fullest extent possible against his too-kind grandfather,
BUT,
But, it's a risk that grandpa COULD face, and needs to consider before taking self-help steps that Georgia law clearly forbids.
It's easy to be a keyboard commando and tell somebody else to go violate some other dude's rights and break the law when YOU HAVE NO SKIN IN THE GAME.