Amateur radio can't be used since the FCC prohibits the use of encryption or otherwise obfuscating the content of messages. Also, commercial use of amateur rad

Amateur radio can't be used since the FCC prohibits the use of encryption or otherwise obfuscating the content of messages. Also, commercial use of amateur radio is prohibited which means using e.g. an open WiFi access point with your call sign as the SSID could be trouble if someone were to go to amazon.com... it's a gray area though.