Doesn't california have a massive drug problem and literal armies of drug addicts shitting in the streets and harassing families and tax-payers? How will this help?
The image you mention are people who are legit in trouble and in need of help, they might be abusing substances, sometimes several types at once, they might be sleep deprived, dehydrated, confused and don't know what they are doing and need medical/psych help. They might be in the middle of psychosis (it's absolute hell). Taking meth then heroin then some weed then some more meth over a 3 day period will have anyone running around in the streets - people need to respect the power of these substances (or rather, the thin line between feeling normal and madness).
There is a massive difference between 5 friends in the woods consuming psilocybin, playing drums and staring at the clouds for 5 hours in peace, than people running around naked and losing their minds.
The real bad stuff: heroin, meth, other opiates, mixing drugs.
The semi safe: cannabis, mescaline, psilocybin (lsd, dmt, salvia = risk for average folk).
And then I'd totally recommend a calm, safe environment, preferably out in nature. Simple musical instruments to play with. People who you trust an can hold your hand if you get stuck. It's that simple. Don't do it in public, crowds, noisy places with too much lights (well maybe a music festival, but still avoid them) or do it with intentions of getting high or for fun - rather try to use them as tool to commune with your deeper consciousness and get aligned to it. It can also be worthwhile to consume them in a ceremonial/ritualistic setting with a shaman person that can help you navigate certain aspects of it. For your first few times don't do it alone.