Pardon me for this comment, I'm low on coffee this morning. It's going to be mostly rambling, but I'll try to keep it short.
I remember reading and hearing that one of the reasons young people get addicted to things like heroin, etc., is due to the fact that schools, parents and government told them that things like beer and marijuana were deadly in any amount - then they would go on to have a few beers at a party, and maybe smoke a joint, and when they wake up the next morning with no negligible negative effects, they reject everything else they've been taught - including warnings about things that are that dangerous.
This was certainly my experience to some extent, though I am having trouble connecting it to the conspiracy theory thread. It's a basic credibility problem – if the grown-ups lied to us about weed, why should we believe them about heroin? etc.
I remember reading and hearing that one of the reasons young people get addicted to things like heroin, etc., is due to the fact that schools, parents and government told them that things like beer and marijuana were deadly in any amount - then they would go on to have a few beers at a party, and maybe smoke a joint, and when they wake up the next morning with no negligible negative effects, they reject everything else they've been taught - including warnings about things that are that dangerous.