Ehhhh, I understand, but, you have to understand more times than not that it has a poor effect on your concentration. Consider you're working around food, you don't want somebody who is a frequent pot smoker to put something in the food on accident and now the company has to go through and find which batch, make sure nobody has consumed it yet, make sure it's not on the shelf, they get deductions to the roof from their brokers. This could cost a company thousands, and companies just don't have thousands of dollars sitting around anymore. It could, as somebody mentioned before, effect other workers too.