I disagree. Possession of a jamming device is illegal in many jurisdictions. Wirecutters are not. I could kill all data communication in most buildings out the

I disagree. Possession of a jamming device is illegal in many jurisdictions. Wirecutters are not. I could kill all data communication in most buildings out there just by sneezing in the wrong cabinet (personally experienced). And then what are your wired cameras going to do? If the answer is "make loud noises", well, that's pretty much exactly what wireless cameras could also do. There's a reason 'professional' alarms generally prefer wireless connection and battery power (and loss of connection is generally an alarm-raising event).