RF signal jammers are a thing.... they also are illegal. Certainly if you had a RF source blanket the WiFi spectrum at 1kW, you'd knock out WiFi cameras (legal

RF signal jammers are a thing.... they also are illegal. Certainly if you had a RF source blanket the WiFi spectrum at 1kW, you'd knock out WiFi cameras (legal operation in the WiFi spectrum is limited to 1W, and is often used at less). The same idea would apply to anything using a radio, like cell phones, GPS, etc. Again, this is completely illegal though.