Damn, why's everyone hating on people who don't do drugs?
It's not really the doing, it's the trying. My statement was too extreme; it's more of a general rule, based on personal experience in my generation.
For me, there has been a consistent quality among the people I know who were vocal about not trying it, particularly at a certain age, and yes, they tended to be active politically on the right-hand side of things.