First, yes, I had lots of problems navigating the social sphere, it was like there was some minor detail I just didn't understand, but which was crucial, it felt like it made me look and feel like a idiot. MDMA took all that away, it showed me that no, no one cares, just do your thing and don't bother. I did MDMA a few times during a year period.
Second, NO, psychedelics absolutely do NOT cause schizophrenia in my opinion, BUT people who have underlying symptoms or are prone to it, for them it can very much act like a trigger.
I can say, hands down, MDMA cured me from all and any social anxiety, it showed me that no-one gives a fuck, everybody is just the same and wants to be heard.
Its so funny, every time links like this gets posted I just nod and think "Poor bastards, they haven't figured it out yet?"
It's been 8 years since I did MDMA, so far no negatives as far as I can tell. Obviously, as with any strong drug/psychedelic, you will be a different person after the trip, what you take from that, is up to you. It is not for everybody, and especially if you feel you are prone to something like schizophrenia do NOT do psychedelics.
While on Naltrexone I felt a create decline in cravings, although for Marijuana and not alcohol. The noticeable side effects to me was irritated stomach and feeling very tired and fatigued, which was a plus, sleeping on cannabis withdrawal is a major bitch.