No tethering, no customer
At least speaking for myself, the crazy anti-tethering policies are the main reason I haven't switched to a smart phone.
All the packets you can eat, but only on the tiny phone display? I don't wish anyone ill, but whoever goes blind first, please be sure to sue the phone company that did it to you.
Even more amusing is a large Japanese phone company that sells unlimited packets--except for any form of streaming, any form of P2P, any form of VOIP, with additional restrictions against many popular games. All you can eat, as long as you like to eat rocks--and only small rocks, to boot.