The Federal Communications Commission (FCC) has observed a rise in the sale of "jammers" - gadgets capable of disrupting cell phone calls, text messages, Wi-Fi networks, and GPS systems - which could pose a threat to public safety.

The small, battery-powered devices can be used to create "dead zones" within a small area, usually 30 feet or so, and have been used by movie theaters, restaurants, and schools to keep people off their cell phones. But they also cut off 911 calls, can disrupt navigation near airports, and have been used near police stations to interrupt radio communications. Officials at the FCC say they've noticed an increasing number of jammers, which are banned by federal law, coming into the country. Many cheaper versions, which sell for as little as $25, are imported from Asia, according to the agency..

The act of selling, advertising, utilizing, or bringing in wifi jammers is considered illegal under the Communications Act of 1934, which prohibits the obstruction of radio communications in public spaces.

The FCC recently issued citations to eight individuals and businesses who were promoting jammers on Craigslist.

The Federal Communications Commission stated that jammers were promoted on the website in Orlando, Philadelphia, Austin, Mississippi, Charlotte, N.C., Washington, D.C., Cincinnati, and Corpus Christi, Texas. Authorities have indicated that they do not think the incidents are related.

Michele Ellison, the FCC's enforcement bureau chief, stated that simply placing an advertisement for a signal jammer on websites such as Craigslist.org is a violation of federal law. signal jamming device are considered contraband for a specific reason.

Based on the references, the majority of vendors promoted jammers as a means to enjoy an uninterrupted rest on public transportation, maintain a peaceful learning environment, or ensure a hassle-free space, without mentioning the device's potential for illicit purposes.

One of the citations expresses growing apprehension regarding the lack of awareness among individual consumers who use jamming devices about the serious repercussions associated with their usage. These operators mistakenly believe that their unlawful actions are justified due to personal convenience or should be pardoned in some way.

According to the FCC, at least one seller appeared to be aware that jammers were considered contraband.