If it was traumatic enough, there would be flashbacks. Deeply buried issues and phobias do tend to well up, and that would provide the trauma. If somebody’s already pretty messed up, strong psychoactives might be all that’s required to send them completely ‘round the bend. Other more grounded individuals tend not to experience such a trauma and rather enjoy it.
I had a misspent youth like many, and would never go so far as to advocate the use of such things. It can be extremely dangerous for the reasons I mentioned. But, for most, it’s not exactly traumatic, and they find it enjoyable. Heavy past users are changed by it though, in my observation. Too intense, very offputting.
“Will all great Neptune’s ocean wash this blood
Clean from my hand? No, this my hand will rather
The multitudinous seas incarnadine,
Making the green one red.”
I might be considered offputting since I consider most people I meet to be completely stupid and clueless. ;) Very much a loaner and would rather read or create (I'm not a bad artist and also do many fibre arts) than have to chit chat with people I don't really like.
I agree completely with that. The problem is a person is unlikely to know their issues are so deep that acid will put them 'round the bend. In fact those are the ones who are least likely to have sound objective judgment about themselves. But almost anyone can have a deeply buried phobia in their psyche and not know it so it's a crap shoot for anyone who drops a hit.
Alcohol is an even bigger crap shoot though. No one knows who will and who won't become an alcoholic when they first start imbibing. A far higher percentage of people who try alcohol become alcoholics than the percentage of LSD experimenters who have a seriously bad trip. That's a nightmare that doesn't go away in 12 hours.