This dissertation consists of a study of the relations between the types of social control and the mass ilegalisms by means of an ethnographic research study conducted in a neighborhood located on the favelas of São Paulo.On one hand, this attempt aims at finding some locations that suffer the incidence of this social control, their economical and political networks, based on three observation points: a small birosca (a small store, generally in a slum, where food and alcoholic drinks are sold), illegal transport and crack houses; on the other hand, it also aims at studying the conducts built in these points of insertion of the informal, illegal and illicit urban markets and their correlated exposure to the risk of death.In this crossroads between the incidence of the mechanics of power, the plots of the mass ilegalisms and their corresponding conducts, it may be impossible to understand some of the dynamics of this social world, which takes place between informal, illegal and illicit issues, as well as between life and death.