I'm all about forgiveness and giving a guy a second chance. Yet I don't think its illogical to be terminated for exceeded this company policy. Voluntarily partaking of a drug in quantities that you know can inhibit your decision making and motor skills while carrying 80 souls aboard is reckless behavior. A few years ago a regional pilot flew drunk with 3 buddies in a GA plane and they all tragically died when he put the plane into a stall/spin after takeoff. They didn't get a second chance. Good decision making starts well before you get into the cockpit.