[rcoveson]

Your conversations aren't just not encrypted, they're totally public. That's unacceptable for most communications.

Take everything you do on a phone call, over SMS, and over the Internet. Subtract anything personal, anything business related, anything involving copyright (e.g. watching a movie or listening to a song, even if you own it), and anything you don't want associated with your identity (anonymous blogging). Also, I forgot to mention that broadcasting is also disallowed. You couldn't just start telling poetry on a frequency without regard to anybody who may or may not be listening. You also can't use the bands for any commercial purpose.

Anyway, after subtracting all that, what your left with is what people use the band for today. Which, I suppose, could still be considered "general purpose." But when I said "general purpose digital communications," what I had in mind were the sorts of things you use email or the web for. By volume, mostly music, videos, porn, ads, and private business operations.