If police announced that they were looking for a guy in an orange jacket, you could put on an orange jacket and run around town generating lots of false reports. But why would you do that? That would be incredibly antisocial.

As usual, the tech angle to this story doesn't make the story particularly novel, but some tech-oriented people seem to have trouble perceiving that. E.g. people commenting that MAC addresses aren't unique, as if other forms of police descriptions of suspects (like height, hair color, or clothing) are unique...

If the prosecutor is annoyed enough and it's clear enough you did it because of this, not some weird accident, "interference with a criminal investigation"?

very likely, but the guy that "owns" the mac is up for more than interfering. so its a win for him, not that its even remotly cool but this could take some time to resolve and get worse in the meantime.