Proscriptions are collectively assumed societal regulations that insist certain behaviors are prohibited.
It is probably not acceptable for a Frenchman to cheek-kiss a Norwegian. Norwegians are known for their stoicism, Frenchmen for their love of emotionally liberating wine. But, I learned right-cheek-kissing from Hispanic culture, and I do it to everybody, regardless of their culture.
Some proscriptions are stricter than others. Proscriptions are probably most important to teenagers, who can be stricter than adults about it, for it determines top dog popularity.
Regarding myself, these days, not eating sugar is one of my proscriptions. But my not eating sugar has never been suppressed like my desire to cuss. Fortunately, not eating sugar is not rigidly repressed, since my personal unconscious fondly remembers how many times I have never been rigid about this particular proscription. Tonight I had ice cream at Jason’s Deli.
Consider rebels and revolutionarios.