Let's start again. How secure do you suppose this means of distribution of internet might be? I can't see an easy way of extracting credit card information from it, but suppose I had sufficient MONEY and had bought the same immunity from prosecution as the ISPs, couldn't I just bust in on everybody with a load of advertising for, say, three quarters of the time, to start with? A bigger signal would reduce the amount of interference from ISPs , and I could always get feedback in order to repeat anything that was lost until it DID get through.