Despite risking imprisonment of up to six years and a fine of up to US$54,000 for what the law calls “aggravated theft of the radio spectrum,” illegal stations proliferate in Peru, and the Ministry of Transport and Communications (MTC) is working hard to disable them. In the last five years, the MTC has filed 910 criminal complaints, made 714 precautionary seizures and seized more than 2300 pieces of equipment. Improper use of radio signals also degrades the quality of services received by citizens, and interference with aeronautical communications can create dangerous situations. And it is not only broadcasters who risk penalties, but also advertisers: airing commercials on an abusive station is a serious administrative offense, and the fine ranges from $11,000 to $32,000.