For some people (including some members of law enforcement) if you don't have the magic medical card you can be arrested even if you are a responsible person who uses medication for pain or for an illness. At many workplaces bosses think it's their right to harrass their employees and threaten their jobs when they get sick so they avoid calling in and instead take something to help them get through their day. Then they're accused of using drugs and threatened some more. The threats cause mental anguish. At a place I use to work at many people were on anti anxiety drugs because of the constant threats, lies, backstabbing, and harassment. Harass, Rinse and repeat...  It's a catch 22. I think the fear of constantly being threatened with arrest or being fired from your job and seeing people and knowing people who have gotten beaten up by police and bosses who have anger management issues when it comes to medications people use causes more harm than good.