Stupid
Will people never learn?
Basic physics. You can't have more than a few hundred bits per second on power lines without two issues.
1) Signal susceptible to mobile radio and interference.
2) Signal radiating and interfering with other services.
Domestic powerline adaptors only "pass" FCC and CE because they are tested using loop holes in the procedures. They need to be tested properly, at which point they will either be banned or manage only about 80K bps without interference (and over a shorter range too).