Really? Defies rational sense? Perhaps your WISP doesn't offer unlimited bandwidth. If so, why should you care? What stops you from just charging for the overages? What exactly constitutes an overage in your standard ToS? If you can answer that, fantastic, but the fact that most ISPs cannot is what "defies rational sense".

And please enlighten: what else was incorrect in the above posting? You didn't offer anything but an ad hominem.