This Is Awkward: Mushrooms That Cause 'Tiny Human' Hallucinations Don't Contain Psychedelics
(www.sciencealert.com)
There are some social crises in people life where policing themselves gets lower focus e.g. on a break up. I think the easy access is the problem. And to fix it with opening it up even more is not a good idea.
I would give people money if they can tell who is a dealer. So the market itself would fix the problem.