Again... there is no signal modulation happening across power lines. A computer has no physical capacity to do so without a modem being covertly added. And at that point, why bother with trying to send signals across a power line? You can just send them wirelessly to a transceiver on the outside of a house.
Look, Sir. You can choose to believe whatever the hell you want to believe. BOTTOM LINE: I've been in this business for over three (3) Decades [In and out of the military] and I KNOW what the hell I'm talking about. You're NOT QUALIFIED to even make such FLAT STATEMENTS you're making. IF you don't even know what Longitudinal and Metallic currents are, YOU ARE NOT QUALIFIED TO COMMENT.