So if I buy a new car and the contract says "no connecting ipods" even though I own the car, I guess I should just accept it because I signed a contract? You're free to grab your ankles any time some company tells you to, however I will take matters into my own hands and do what is reasonably appropriate. You can sit there and take the holy route all you like, but I'm sure the day your home ISP, your home television provider, your home utilities provider, or any other service you subscribe to begins double dipping on charges because more than 1 person is taking advantage of them, you would raise HOLY HELL.
2 gigs is 2 gigs, it should not matter how you consume them. I can just as easily watch a few netflix movies on my phone until I hit the cap, just as much as I can tether to hit my cap. What difference could it possibly make how I use those 2 GB's? It doesnt. People like you are the reason these insane policies are developed in the first place, because businesses prey off your ignorance and fear to challenge them.
I dont care about a contract I signed. The contract is garbage and deserves to be broken.