"It also gave too much importance to unusual reactions, which would only affect a tiny number of users"
From the link I posted above. Those reactions are exceedingly rare. You're being hysterical.
"He highlighted the fact that one person a week in the UK dies from alcohol poisoning, while less than 10 deaths a year are linked to ecstasy use."
No deaths, ever are linked to LSD use.
You're almost certain, as far as we can be certain of anything, not going to get any major pyschological effects even from lifetime use of LSD, let alone a single use. It has a major advantage in never becoming compulsive or dependent as an alcoholic may.