Sure but I could see this being used as a side-channel attack to exfil data from a customer in a red team assessment. Practitioners love little tools like this.
Also I'm not talking about 30 miles away...but if a completely intact cable can be detected with a directional antenna from 100m, an intentionally buggered patch cable installed at a client site for this purpose could pose a bigger concern for pilots in the area. (edit: I might be more tuned in to this (har har) because I live in the flight path of a medical helicopter that flies over at ~500' almost daily.)
Ham folks can seem a bit hair-triggered chicken littles with RF hygiene but it's the product of decades of fighting noise from people that aren't aware of the externalities of their actions.
Also I'm not talking about 30 miles away...but if a completely intact cable can be detected with a directional antenna from 100m, an intentionally buggered patch cable installed at a client site for this purpose could pose a bigger concern for pilots in the area. (edit: I might be more tuned in to this (har har) because I live in the flight path of a medical helicopter that flies over at ~500' almost daily.)
Ham folks can seem a bit hair-triggered chicken littles with RF hygiene but it's the product of decades of fighting noise from people that aren't aware of the externalities of their actions.