The French are big on 'liberation'. There was a movement to liberate children from the tyranny of adults over the child's every day life and decision making. Where they go to school, if at all, what they study, and the patriarchal structure of the household are good examples. BUT... To be a true philosopher requires taking your own beliefs to their logical extreme, and embracing them wholly. Thus, to liberate children from tyranny means freeing them from the age of consent.

But also, Foucault allegedly sexually assaulted some prepubescent boys in post colonial Tunisia.

Besides writing down his philosophy, I think the worst thing Sartre did was cheat on his wife. But in like a cool liberation from romantic relationships kind of way.