SUBREDDIT: r/AskReddit
TITLE: Weed - not against it, but it reeks...
POST: My roommates smoke a lot of weed. A few times a day, and for some reason always when I'm trying to go to sleep at the end of the day.

I have nothing against weed, and I have smoked it in the past. But it SMELLS TERRIBLE when you're not participating. My roommates think they can smoke all they want and just close the door.

This got me into thinking I need to do something smelly on my own. I need some suggestions for something that would be annoying for them to smell. I don't want to use stinkbombs or anything that would permanently make a house smell.

Any suggestions?
TL;DR: 
Roommates make the house smell like weed, I want to make the house smell like something else as payback.