Will Ethernet powerline adapter pollute the AC main for audio playback quality?

[electrafixion]

I don't have direct experience with how Ethernet over AC lines will impact computer audio, but I have a friend who was using that technology in his system to connect his Bluray player to his home network.  He was experiencing noise problems in his analog playback, and we eventually found that disconnecting the Ethernet from power eliminated the noise.  His setup is all very high end equipment (I believe at that point he was using a Pass Labs Xono), so I wouldn't attribute the noise to poorly engineered equipment.  

[electrafixion]

The original post sure sounds like running ethernet over AC power lines to me, and I agree Audiophiles should avoid it.  Even if it's possible to "filter it out later" I'd rather not have garbage there in the first place.  Yes, POE is something else, and it's normally low power contained in a given line to power something like a security camera; it should not be troublesome from an audio point of view.