You don't get it, the MJ bill did not prevent employers from firing employees if they were not competent or able to keep up with their work or if they were impaired by their drug use. Again, you have the hand shaking, scary notion of marijuana, and it's frankly silly to the rest of us. People don't have higher associated medical costs because of marijuana, LSD, mushrooms, etc. It's a completely unfounded, fearful assumption on your part, frankly born of ignorance.