Specifically, the ISM (Industrial, Scientific, Medical) bands, that common WiFi operates on, are open to use by anyone, and you can't interfere with anyone else's use of them.
Alternatively, you can license (effectively, lease) your own little slice of spectrum from the FCC, and then it's ‘yours’, and then you don't have to use forged packets to stop other people using it — the FCC will slap them for you.
I thought exactly the same. Why they're using ISM band which is free to use, if they want reliable networks they should use such band in the very first place.
Alternatively, you can license (effectively, lease) your own little slice of spectrum from the FCC, and then it's ‘yours’, and then you don't have to use forged packets to stop other people using it — the FCC will slap them for you.