Yes, but the problem is where is the line drawn? In essence this takes us full circle back to littlepom's dilemma. Do you deny healthcare, or even a career with the RAF, to someone who has tried drugs for whatever reason then had the gumption to bin it? That being the case, we would also have to outlaw healthcare to those who have tried or are using alcohol or tobacco as a blanket ban.
Back to the original point of the thread, I would say that littlepom had better own up to it if asked on the grounds that he already has done at AFCO! BEagle, on a slightly cynical note I do actually wonder how many of your 'clean' and anti-drug UAS students were actually of that stance all the way through their lives to that point...