As someone who considers himself to be a cannabis enthusiast I think you're being way too nice here. There's no excuse for being an inconsiderate asshole who hotboxes (has to be smoking a whole lot for the smell to be spreading around that much) their room without thinking once about others in the building who probably don't want any part of that.
Your first step should be to find out who's doing it and confront them, if you can't find them or they're an asshole then report their ass. Who cares if the guy gets caught? Fuck that guy, he should learn the hard way on what happens to stupid stoners.
Oh and in regards to the thread title, RIP smokedawg420. I miss you weedbro