Sure, but by that token, you can smoke cannabis nightly, show up for work on time, and never touch the wheel of a car either. You'd still fail the piss test.

Sure, but by that token, you can smoke cannabis nightly, show up for work on time, and never touch the wheel of a car either. You'd still fail the piss test. The other thing not touched on too much is how cannabis (despite being one of the least harmful recreational drugs/drugs of abuse, and most commonly used) is one that can be detected the longest. I can go out on a bender drinking liquor and blowing lines of coke this weekend, get called in for a drug test on Thursday, and still piss clean. ...but if I went camping a few weeks ago and spent my evenings passing joints around the fire with friends, I could easily throw a flag for cannabinoids on a urinalysis weeks later. It's really kinda messed up in that way because the logic of "well, what does it say about you that you couldn't lay off the stuff long enough to pass a drug test?" goes out the window with pot. If you like to take a few tokes in the evening after work, that can show up on a test weeks or months later, even if you quit while applying for jobs.