Conflating Derrida and Sartre with Frankfurt's school is extremely weird. Especially Sartre.
Sartre's ideology is existentialism, it have close to nothing to do with the post-hagelism/neo-marxism of the Frankfurt school. The only common point is that they're continental philosophers and atheists.
Concerning Derrida, his main contribution is that the best way of criticizing a book is to make abstraction of who wrote it and when, of current ideas and laws and only judge the book for itself, finding internal contradiction,and that what he called 'deconstruction'. Yes it's the same word as Frankfurt's school 'deconstruction' but it has nothing to do with it. I get why he's classified as a post-modernist,but he is post-structuralist before everything, and post-structuralism is anti-marxism by definition, so making him a friend of Frankfurt's school is disingenuous. Also he disliked Foucault.
Also, Freud, Deleuze, Lacan and Foucault are frauds and while most post-modernism is basically wankery (if this word doesn't exist,it should), Derrida, and especially Lyotard and Baudrillard do not deserve to be put in the same basket. Lyotard because he explained Marvel 'films' 50 years before Marvel, and Baudrillard because anybody who wants to understand social media has to read him, despite the fact that he died before Facebook was a thing. And conflating all of them with hagelians is an insult to any intelligent being who read them.
And for the 'age of consent' petitions you linked at the end, the story is that the age of consent in France was 21. It was then reduced for non-homosexuals to 18, then 15. The petition (at least the one signed by Françoise d'Eaubonne) was to have the same age of consent for both homosexuals and heterosexuals, which ended up happening. The latest petition I think was to either have consent lowered to 13, or have the penal responsibility raised from 13 to the current consent age,but it was signed by like 60 people and quite weird.
P.S I checked the English version and the French version, one has a lot of facts, citations, point of view and seems quite complete, the other seems quite targeted. I wasn't exact in my description of what happened but I'm a lot closer than the English Wikipedia.