Those that understands these things, have known about RF leakage on data cables for decades. When I worked at the Ministry of Defence (UK) back in the late 199

Those that understands these things, have known about RF leakage on data cables for decades. When I worked at the Ministry of Defence (UK) back in the late 1990s, the network cables for different data classifications were always strung along conduits at least 3 feet apart, and anything over the old 'confidential' (i.e. 'secret' and 'top secret') used fibre instead of copper.