The racailles come from da french ghettoS where they spend a hard knock life with their families and homies.
A racaille is often more dangerous than an amrican gangsta because they all keep training (boxing...) in or out of the french prisons. They live a real ghetto soldier life.
Female Racailles do exist, but are not as abundant as males.
I wouldn't go to Chatelet-les-halles if I were you, you might get beaten up by some Racailles.