As sad as this sounds I would be pilling up Gravel laden dirt on my side of the fence as a backstop to protect my property. If he is dumb enough to ask about it then lite his A$$ up for being an ignorant fool. You can do that from your side of the fence. Make sure you video all encounters and your efforts with the back stop. If it continues to escalate sue his worthless butt off.
You can not fix "STUPID"....it is a genetic affliction with no cure.
You can not fix "STUPID"....it is a genetic affliction with no cure.