The most perceptible effects that the anti-corruption reform produced on criminal trials are represented by the usage of repressive instruments in court as well as the abuse of preventive measures of control adopted without proceedings. If follows that it becomes necessary to understand what outcomes can be achieved by means of prevention policy and what limits are to be considered as impassable, affecting the scope of the measures of which the prevention policy makes use. This analysis is aimed at highlighting the situations in which there is a lacuna in the protection of the fundamental human rights and the freedom of private economic initiative, as these rights characterize democratic systems.