ask a third mafioso who knows them both to introduce them to each other and vouch that they are both members. Omertà Omertà is a code of silence and secrecy that forbids mafiosi from betraying their comrades to the authorities. The penalty for transgression is death, and relatives of the turncoat may also be murdered. Mafiosi generally do not associate with police (aside perhaps from corrupting individual officers as necessary). For instance, a mafioso will not call the police when he is a victim of a crime. He is expected to take care of the problem himself. To do otherwise would undermine his reputation as a capable protector of others (see below), and his enemies may see him as weak and vulnerable. The need for secrecy and inconspicuousness deeply colors the traditions and mannerisms of mafiosi. Mafiosi are discouraged from consuming alcohol or other drugs, as in an inebriated state they are more likely to blurt out sensitive information. They also frequently adopt self-effacing attitudes to strangers so as to avoid unwanted attention. Most Sicilians tend to be very verbose and expressive, whereas mafiosi tend to be more terse and subdued. Mafiosi are also forbidden from writing down anything about their activities, lest such evidence is discovered by police. To a degree, mafiosi also impose omertà on the general population. Civilians who buy their protection or make other deals are expected to be discreet, on pain of death. Witness intimidation is also common. Protection rackets Scholars such as Diego Gambetta and Leopold Franchetti have characterized the Mafia as a "cartel of private protection firms". The primary activity of the Mafia is to provide protection and guarantee trust in areas of the Sicilian economy where the police and courts cannot be relied upon. The Mafia arbitrates disputes between criminals, organizes and oversees illicit business deals, and protects businessmen and criminals from cheats, thieves, and vandals. This aspect of the Mafia is often overlooked in the media because, unlike drug dealing and extortion, it is often not reported to the police. In one of his books, Gambetta illustrates this concept with the scenario of a butcher who wishes to sell some meat to a supermarket without paying sales tax. Since the transaction is essentially a black market deal, the agents cannot turn to the police or the courts if either of them cheats the other. The seller might supply rotting meat, or