I've seen guys screaming at the top of their lungs the whole time as they walked them out the building "YOU CANT FIRE ME FOR WHAT I DO OFF THE CLOCK!!!!"
Everyone thinks they'll only get tested if they have a bad accident or they come in high.
Nope!
Management will find a reason to test you if you're a trouble maker, if you don't fall in line, if you happen to get a minor accident during a time of high # of accidents, if you piss them off and anything else they feel like..... but but they can't do that! Um, you think circling a few "signs" on a piece of paper is hard for them? But but I'll just tell them I have a problem!... nope, that's a myth. Once the process has begun its too late. You have to come to them before.
I've said it a hundred times. I don't care if you smoke weed but just know, you RISK your job every time and will have no one to blame but yourself.