"Torcidas organizadas" later became infamous for their association with stadium violence, which would cause Justice to disband some of them (notably Gaviões da Fiel, Mancha Verde and Torcida Independente, both the top and most hard-core firms and active in one of the largest cities in the world: São Paulo).
Rivalry is embedded in Brazilian football culture, but when it comes to their organized (or uniformed) supporters, things can take a turn for the worse.