How can you get fired for smoking weed off the clock?
Where do you work? If you're in the Air Force or something... far call... though I suspect that you wouldn't be smoking at all if you were in the Air Force.
It was a car dealership at the time. I was being nice and went with a friend to test-drive some cars who was intimidated by the vulture-like salesmen. I walked past my department, got called over, and "Hey while you're here, go see HR upstairs, they just asked for you." IIRC, some mechanics, the customer complaints manager, "the last person you'd suspect" from the parts department, and a gaggle of sales people were all fired. The techs were all for pot, the sales people for mostly cocaine. All of it was triggered by somebody at another store getting caught doing something they shouldn't.
I've got a successful business of my own now.. doesn't matter what I do in the evenings as long as it's an evening-only hobby.