Do away with drug screenings entirely.  They don't work.  Impairment testing works far better.  Because it doesn't matter why one is impaired -- could be lack of sleep, distracted from fighting with spouse, etc -- and said distraction could result in injury or death (e.g., if they were operating heavy machinery). Just told a recruiter that not only will I fail a cannabis test, which is legal in my state; I also will not work for an employer who shows that much distrust and contempt for their employees.  Because I know most executives don't bother with cannabis, they're mostly coked up.  Hypocrisy. Agree strongly with your first and third points though!  :)