Long term hallucinogen users: Have you noticed any negative effects?

I don't see any posts here about this topic and in general every person here seems to be a short-term hallucinogen user (first time trip report, asks about how much they should take during their first trip etc. etc.) and in every post it seems to be the person's first time hallucinogen tripping. I read the first comment on the front page of this sub and in every one the hallucinogen user hallucinates once or twice in their lifetime and never lights up again. I just want to hear about hallucinogens from people with long term hallucinogen using experience. What kind of negative effects have you noticed? What kind of positive effects? I want to hear long term hallucinogen tripping stories, and in particular negative effects which I just don't read about on this sub.