This kind of thing has been going on for a long time. A lot of adult marijuana users consider their favorite weed to be the most harmless, enjoyable thing in the world, so why should their teens be deprived?
In the 1980s SF Bay Area, I knew a number of parent-teen drug buddies.
Heck, I even knew a guy who said that he smoked pot with his grandmother. Grandma was an RBG-like 70-ish Jewish lady who lived in one of the wealthiest enclaves of Marin County, California.
I was in that are in 1983-1984. Wife was a reservist at the Presidio.
The HIV/AIDs crisis was nightmarish. But the porn star lifestyle all up and down the coast road was even worse. A whole lot of teen girls got messed up and messed over in that area.