i posted on the other thing too.
if u dont mind me adding to the ideas instead of fighting him or egging his sh*t why dont u just germinate a ton of swag seeds then go plant them in his yard but somewhere kinda hidden then when they get big put a sign outside his place saying "since i got the competition busted come buy my pot" lets see what happens. itd be funny but make sure u hide the sign so he wont see it unless he walks outside. lol