Unfortunately, I don't think addiction is the only problem here. Specially considering hallucinogenics or MDMA, high doses, an unappropriated environment, a bad day, a bad trip... you know, some people, namely those who love psychedelics, advocates that a bad trip can teach you many things and perhaps it is true but the boundary between the knowledge and the trigger for a panic attack is thin, which is dangerous. It is dangerous because once panic is installed it can last forever and destroy a life. Hard drugs are a game, we play, we can win, but we can lose, are you willing to risk the mental stability of your kids for fun? As a parent, I think protection must be the motto.
As a son, I have had the opportunity to do drugs with my parents and other relatives that, when I was a child, I would have never imagined a situation like that coming up... being sincere, it was disgusting to see them fucked up, babbling, tripping balls. I kinda lost some respect, not because I am a conservative person but, defining in other terms, it is like an underlying lost of respect (that arises in the profound subconscious and not as a planned thought)