Yeah, and smelling it in my room doesn't mean that I'm setting off the smoke detectors.
It's not me. That's stigma, and I'm actually fairly sure that other people smoke in their rooms as well. Smoking cannabis through a pipe only produces a tiny amount of smoke, and I smoke out the window (mostly). I've been smoking in my room for about a year, and the one time that I definitely set off the smoke detector, I was boiling water: the latch got stuck, so the entire pot boiled up while I was listening to something on headphones. If they have a problem with it, they should say so to my face. Smokers can moan, but I'd recommend that they buy a Smoke Buddy Jr. That's something the weed crew could buy me for Christmas.
Put it this way: lots of people are cooking in their rooms in this boarding house without setting them off, and most of the people who do set off the smoke detectors are people that are cooking. It's pretty lax: the other place was similar.