Sammy Pilot,
One of the things the FAA tried to do was require Alcohol testing along with Drug testing for pilots and others in safety related functions. The interesting thing to note is it was to be done routinely as part of the aviation medical exam and not on a random basis at the airport immediately before work activities were begun.
My view is it takes a real Nimrod to show up for a flight physical reeking of drink....although that did happen in one sunny clime I worked in a few years ago. The crucial test for all of these measures is whether it is a bureaucratical burden or does in fact effectively work towards improving safety.
I submit drug and alcohol testing at flight physical time is not the time to be doing it but rather on the ramp prior to touching the aircraft is the time.