Apple: Jailbreaking substantially diminishes value of iPhone1 year ago
Wired linked to a very interesting document with comments from Apple about jailbreaking your iPhone:
The value of the iPhone, and hence the software embedded in it, is substantially diminished when the integrity and functionality of that software is compromised by jailbreaking
If that wasn't absurd enough for you, Christopher Soghoian points out another interesting except:
[E]ach iPhone contains a unique Exclusive Chip Identification (ECID) number that identifies the phone to the cell tower. With access to the BBP via jailbreaking, hackers may be able to change the ECID, which in turn can enable phone calls to be made anonymously (this would be desirable to drug dealers, for example) or charges for the calls to be avoided.
Soghoian brings up a great point in his article: if having an open device is good for drug dealers and terrorists and bad for consumers, where does that leave Android or the Palm Pre.
