I'm not the first to come up with the term, but judging from search results, maybe the third or fourth.

Toxic adulthood is, broadly speaking, insistently associating things with adulthood that have no good reason to be associated with it and judging or harming oneself or others on that basis. That includes not only the idea that adults should have power over minors, but also the idea that adults do or don't do certain things. It's the notion that adults shouldn't watch My Little Pony, that adults should know how to drive a car, that adult toothpaste must be mint-flavored. It's criticizing adults' behavior as "childish" or saying that a "grown-ass man" should know better. All that sort of stuff.

This seems like such an obvious term, I'm surprised it's not already in regular use. Similar uses of "toxic" are well-known now, so it might be useful for calling out such behavior in a readily understood way.

PDF version (watch out for fake download button ads)

A book on the history of public perception of pedophiles and child sexual abuse throughout the 20th century. It's interesting to see how often and how dramatically public opinion has shifted, driven by fads in psychology, law enforcement looking for more power, and individual criminals who got outsized attention. But there has always been absurd, baseless bullshit, whether we're morally defective imbeciles or insatiable monsters.

It's been a while since I read it, and I don't remember a lot of specifics off the top of my head. I'll have to go through it again sometime. Good to know how things got to where they are, and it's somewhat reassuring that big panics have come and gone before.