Re: poorly designed OS creaking at the seams (@TFM)
If the phone doesn't lock when paired with a hands-free device then the phone of anyone with a bluetooth headset is permanently unlocked. So as soon as one of those people leaves their phone on the bus, on their desk, is pick-pocketed, etc, the story would be that a security vulnerability had allowed their contacts/email/the rest to be accessed.
I also think Siri is Apple's attempt to integrate calendar, dialler, maps, GPS, etc. I'm don't think it's a good implementation but it's an attempt, at least.
Regardless, answer this: are there — as the poster suggests — any grounds whatsoever to conclude that because one of the supplied, first-party applications displays information when we as users wouldn't want it to, the operating system must be "creaking at the seams"?