How about interference from the wide range of chemicals that some people put on their hair within a month or year?

It is none of these POS business to begin with, if they are worried about me drinking on the job then breath test me - if not then asking me for a hair sample may result in some impromptu dental work. Your commitment as a employee is to represent the company in a professional and competent manner, aside from that they have no business whatsoever in my off time activities - drinking is legal if done responsibly ( ie. NO DRIVING WHATSOEVER ). I am not corporate property so test me at your own risk, misdemeanors can be worth it at times. This control every aspect of our lives thing is going well beyond too far - we are not inferior to these men & women who see themselves as our superiors in every conceivable fashion. In fact some of those corporate scum aren't worthy to lick the jam between our toes. At least we live outside of the plastic fantastic barbie & ken prototype zone where individual thought is an abomination and group think & supersedes any trace of the individuality granted us by God Himself. - yea, this "I will control you" crap perpetrated by sissies really makes me angry. BTW I have a executive sales job with a great boss and great co-workers, I am blessed in that dept so I don't have to deal with that crap anymore. I used to work for the pointy haired boss from Dilbert, seriously.

As Paul Harvey would say, that, is the rest of the story.