You're making a few assumptions there that I wasn't making. Just because it's wireless, I don't have any expectations of using it outside of my home.

I could technically run my own ISP in my apartment building by hooking up a router to a cable connection and charging a minimal fee for access. In fact, I'm sure quite a few people are already doing that. It would just be a problem if the cable company found out and terminated the account. If I were to get a business level connection that doesn't have those sorts of restrictions, there would be very little to stop me from running my own ISP. Well, except the government and the local corruption racket.