Its predictable:
Have a bad experience?
“Whaat no way dude, you must have taken something else or you were predisposed to schizophrenia you should have predicted that and checked your family history and genetics first! This experience is totally invalid to us and anyone considering using our favorite psychadelic”
Develop schizophrenia?
“[abbreviated version of the same response]”
Have an interesting idea?
“Just an anecdote! More research necessary”