>That's nonsense. We haven't done that for alcohol, and it's a lot more prone to causing accidents than pot. It impairs people more.<
It doesn't matter that the pot caused, or didn't cause, the accident. If it was in their system it gives a lawyer the legal opening to sue the employer.
The reason you see all the companies going to zero tolerance drug policies is because the liability insurance companies charge them a fortune if they don't have one.
The difference with alcohol is you can smell it on their breath and see rather easily if someone had too much. That isn't the case with pot, plus there is a cheap, instant test for alcohol.
I couldn't care less that someone smokes pot at home on the weekend but the company insurance policy demands that you have zero tolerance rules. The reason is lawsuits. You may not like that fact, but it's still a fact.
A lot of companies would probably still test for marijuana and not allow pot smokers to work for them even if it was legal. We see the same thing already with cigarette smokers. There are companies now that won’t let cigarette smokers work for them even if they only smoke when they are off the clock and away from company property. Courts have backed the businesses on this. I imagine we’d see the same thing with marijuana if it was legal.