Re: How do you police this?
Same way they do today. They act on reports - so if you program your router to use channel 13, and some licensed user of that spectrum (I have no idea what it is used for in the US) detects interference they call the FCC. The FCC finds you and fines you heavily, and you decide that being clever and using channel 13 because "my neighbors won't be using it so I'll get better performance" wasn't worth it after all.
Biting the hand that feeds IT
