Legalizing all drugs wouldn't be very bad, sure some people would go nuts but they do it anyway right now. And as for pilots and such, the airlines and private companies could still require tests for employment. If you make tacos for a living they might not care what you do in your spare time but if you hold the lives of hundreds of people in your hands every day then the company that employs you will be very interested in whether or not you spent the weekend trippin on dose.
Legalization and regulation, it can work.
Everyone should check out "www.leap.cc/" (Law Enforcement Against Prohibition)
A bunch of cops and ex-cops who think we should move toward legalization.