The point is that most "normal" consumers don't intend to hack their appliances.
It would never occur to me to try to hack an iPhone so I could use it with some service other than ATT/Cingular. Just as it would never occur to me to open up my stereo and mess around with it. Or my electric razor.
In the case of the iPhone, I just declined to buy one.
It is a given in a certain part of this community [meaning the users of computer products, and the iPhone is actually a portable computer] that there is a segment that will seek to expand the uses of the software, firmware and hardware that is for sale.
It is also a fact that the industry depends, in part, on this kinds of people because it is where much of its innovation comes from. Particularly so in brand new equipment.
Example: We have a WWW because there were such a thing as ARPAnet and, even more so to the profitability side, early Fidonet [a network of open source type volunteer network coordinators who were responsible for connecting tens of thousands of BBS's across the world back in the 80's] that showed that such networks were 1) doable and 2) could be made profitable.
We used systems, computers, telephone services, etc, in ways they have never been though of being used before. Learned from it in our hobby/voluntary doings and than took what we learned and made it pay. Then CompuServe, GEine, Prodigy, AOL and eventually the internet came along, with venture capital, and did it bigger, faster, better. It all started with those guys tinkering in the garages and basements. Just like commercial radio had before it, and even TV [though some what less so] before that.
Its a given and its shouldn't be curtailed or punished, and that is what Apple and ATT are trying to do. Stymie innovation and punish creativity. Some of the very reasons they exist at all in the first place.
Anyway... end of rant.