Re:TOS violation? (Score 1)

Why should streaming video be a no-no? I pay for a unlimited data package with AT&T. My phone (HTC tilt, bought at an AT&T store) offers me the option use Internet Connection Sharing and connect it to my laptop, which I do use on occasion when WiFi is not readily available. Why would using the data im paying for (more than I pay for radio net at home by the way, for less speed) be considered a TOS violation?