Actually, that's not a Libertarian position at all. I'd go along with the concept though, if the "anyone that uses" clause includes all government employees, including all politicians at all levels and all LEO at all levels and all CEO's and Board members. In short, everyone must participate. Line all these people up to pee in a bottle everyday, and I'll get in line with them. Let's see just how entrenched the drugs are in our society. From my own experience, many would be surprised at WHO does drugs! Blackbird.
I'm all for mandatory government testing, esp in Congress :')