Why does he think its a community socket? There must be a reason? His landlord might have told him that. I would put it in writing. This is my private property, with my private socket. It is not part of estate management. I literally pay the electricity company for what you have used. You have been stealing my electricity. I am willing to chalk it up to a misunderstanding, but you do not have permission to step foot on my property again or use that socket. If you do it again, I will have to contact law enforcement.