BPL sounds good at first, but even if it did not make some rf go goofy this is more about the power corps wanting to get more return on their investment. They sould wire up fiber on their right of ways not use the power lines. But bpl cost less to do you have the lines only need to buy the connecter that bpl use and the main backbone/network past the power lines.
_________________
"Reality is that which, when you stop believing in it, doesn't go away." Philip K. Dick