I don't even have a freaking iPhone dude so spare me the lecture about what you automatically somehow assume I'm doing.
Regardless, what you can and cannot 'easily do' is IRRELEVANT. If you paid for 150GB of data then you are entitled to 150GB of data. And and it's not that hard to DL a lot of data on an iPad, for instance. A computer is a computer. Just because it's smaller doesn't make it fundamentally different. Safari is on an iPhone, an iPad and a Notebook. And I don't think most of these people doing this are running Bit Torrent clients on their tethered connection. Many people just want to check their e-mail on their notebook. I don't see how that entitles AT&T to more money for the same data regardless of whether it's checked with your e-mail on the iPhone, iPad or iMac.
What YOU and others on here REFUSE to acknowledge is that AT&T are unbelievably GREEDY, immoral and despicable for trying to charge people twice for the same data they already paid for.
Some don't see it because they think the greedy rich are always right and that the average hard working person should bow down to the almighty rich people. They believe that the top 5% should control 99% of the wealth and everyone else should just take whatever they're dishing out. They want early fees, late fees, in-between fees, going to the bathroom while on the clock fees, processing fees, handling fees, baggage fees, pillow fees, sitting near an aisle fees, and a surcharge if your socks don't match your shoes fee. If you don't like those fees, you can just go without because you won't get the service without it. You must AGREE to the software terms, no matter how ridiculously unreasonable or return your opened $60 game which the store will NOT take back because it's been opened or pay a 25% 'restocking' fee. Too bad. But no, it's the person who is sick of getting constantly screwed by the system that is in the wrong....