
I can understand why the NSA is hard on drug use
It has enough trouble with consultants hoarding secret information, using unregistered copies of MS Office and not paying attention to Internet-facing servers with tons of juicy exploits on them, not to mention so-called "security personnel" who apparently let people leave with reams of top secret documents without batting an eye.
With all that, it does not need potheads who could be bribed or coerced into revealing yet more information to The Wrong People (TM).