The problem with commenting on the Constitution and/or the Bill of Rights with regards to this topic is that today's problems were in no way applicable back then.
Doctors back then? We didn't have surgeons. The state of medicine back then...if the Doctor was 'buzzed' your chance of survival probably wasn't altered that much.
Truck drivers (especially those transporting flammable and/or other hazardous materials), airline pilots, military pilots, the military in general - no possible correlation.
There was not a single occupation back then where negligence could put dozens of innocent lives at risk
so quickly.
Friendly fire with a musket? One guy dies. A combat engineer who is hung over and screws up the fuzing on a military demolition job is going to kill everyone within 15 meters of him, every time.
Pilots - don't get me started on the comparisons. The captain of a merchant ship back then could be dead and the crew would still get the ship to a port safely.
It's about discipline in my book - an airline pilot, a SSN Skipper (or anyoone who's a part of the crew of that SSN), a pilot in general, a surgeon - they are going to be and should be held to a higher standard of discipline than a network administrator (providing he doesn't work on FAA computers).
To me it's not about good or bad. I don't care if people smoke the ganja in terms of judging someone's character. Some of my best friends are lifetime members of that club. I think no less of them because of it. Hell, 20 years from now, when I'm not tested and won't have a clearance I'm willing to bet I'm going to be tied down and have a bong duct taped to my face at at least one party.
But sometimes people who use drugs (including alcohol) recreationally let the recreation get out of control, or sometimes the recreation gets out of control regardless of a person's intent. It's not a judgement of them in my book - it happens sometimes and that's life. The testing is to protect 'innocent' people who are trusting a professional with their lives (be it flying drunk, becoming addicted to something and selling classified data to support a habit, falling asleep on watch, showing up for surgery with unsteady hands, etc.) from the worst case scenario involving a professional's voluntary recreational habits.
The worst case scenario varies greatly amongst different jobs. If your worst case scenario involves people getting killed, everything can go wrong even if you do everything right/'by the book'/etc. There's no need to triple the odds of the worst case showing up because you had 4 too many the night before and your reaction time is 80% of what it should be.
Everyone who is a network admin., smoke one for everyone who can't until they retire.
Mike/wulfie