I spent a solid year of my life being stoned 25/8 and no laypeople ever really noticed. I'd venture into the high school classroom on vicodin and weed all the time without any sort of bother (sometimes people would sincerely ask if anyone else smelled skunk, I'd just not get involved with the conversation). I had a homie I'd blaze with all the time who had long hair. HE would always get called out on it. you know those busters in a classroom.

"dude are you HIIIGH? wow dude you're high huh? you smell faded, dude you're high"

He'd get this every day. We eventually concluded that the reason the smell was so poignant on him was because his long hair kept it in (he smelled his hair one day, and claimed it smell like a half-pound), whereas I keep a 1' buzz and never had a problem with it.

Once, though, the assistant principal was chasing me through the campus (im talking sprinting here) and I had some plants on me. That was some tense shit I was drugged up as a motherfucker all stoney balogna running around the campus with this fat bastard after me. I managed to get out of it unscathed.