Hi /adv what would you do

My ex-flatmate idiot trying to be funny and pulling some stuff recently for example how messy my room was and similar fucking ridiculous things, who the fuck cares about those things... - people that has no life and need attention !!
Anyways haven't seen the guy for a year or so after I almost smashed his face when we lived in same house... Meet the guy yesterday-dude is trying to be funny again...not mentioning that his number one on my"hit list"
I got so fucking pissed off inside I thought I'll kill the guy... but been sitting and checking what would he do , so the end i ignored it..
Should I damage him badly next time or leave this shit cos not worth of the lowlife goblin ?