I honestly think it stems from the official government stance on marijuana, especially when it comes to "drug education." It's hard to find out that everything you've been told about pot was a lie without assuming that everything you've been told about every drug is a lie. But in my experience, the only lies were about pot and mushrooms. Everything else was pretty much spot on. Cocaine really is as addictive as they say it is. And to a much greater extent so are heroin and meth. But when you make people assume that everything they've been told was a lie, at least some will want to find out for themselves.