Sounds like he spited the tradespeople and the landlord. I bet the students didn’t care if their carpet smelled like piss.

However, if he had previously complained to the landlord, and the landlord didn’t do anything to fix the behavior of his tenants, from whom he is collecting money and allowing them to disturb neighbors where he himself does not live, then fuck that guy. Should have pissed on his carpet too.

I’ve had similar neighbors. I complained to the landlord, and those assholes don’t do shit.