http://www.ncbi.nlm.nih.gov/pubmed/20587768
I can't help but interpret this as 'we were hoping to discover something that bolsters our anti-drug bias regarding LSD, but actually we didn't manage to do so'.
Regarding the permanent psychosis, it goes without saying that any powerful hallucinogenic drug can influence a person's mental state to one degree or another. The question is - Does it happen frequently enough to make LSD particularly dangerous (not as far as I can tell), and is the LSD causing the psychosis, as opposed to uncovering a latent problem?
People with psychiatric problems are often drawn to abusing substances, this is well known. So, yes, rehabs and hospitals are likely to see patients who are mad as hatters and happen to have taken LSD perhaps, but there are different ways to interpret this situation and the causes thereof. 'LSD made patient X go crazy' is not the only option, but oddly, it's the only interpretation people accept, when they have an obvious anti-drug bias at play.
*edit*
Again, I know
many people who have used/use LSD. They are all normal human beings, with no unusual level of medical or psychiatric issues. I suspect that most people who know users of LSD would say the same thing.
I know this is not evidence of anything in any meaningful sense, but nor is all this abstract bull****, that doesn't appear to point to anything concrete at all.