[AngryData]

Well harm has to be defined because different people use it in different ways. Would I say it cannot cause mental changes that can be negative? Of course not, plenty of people don't smoke just because of the anxiety they get from it or other things. But classifying people who smoke as stupid or brain damaged is an entirely different thing and there is very little evidence for that. Social and ideological changes that hallucinogens can cause in general are not simply good versus bad. And there is no link anywhere that makes hallucinating itself cause brain damage, there are tons of ways for people to hallucinate that don't cause brain damage so I don't know why you would automatically assume any hallucinogen is assuredly doing damage.