Wow...you really need to educate yourself. Here's an idea--pour yourself a couple fingers of scotch, pop a xanax or two, and Google up "deaths attributable to cannabis". Then actually read. Put away your preconceived notion that Nixon was always right and really look at the facts. A workforce that smokes a little cannabis in the evening instead of drinking alcohol is going to be far more productive and alert in the morning. Effects on health will be minimized, meaning lower insurance premiums. There will be fewer off duty altercations, which means fewer on duty headaches for managers. The only people who would be harmed are the  black market agents(you're not trying to protect them, are you?)

Like I said....educate yourself.