But this doesn't help if you are connecting to a computer that is NOT running iTunes!
And remember, even a computer that DOES have iTunes installed, is NOT running it at boot-up time. So if I plug my iPhone into my Windows workstation when Windows is running (and iTunes is installed), all is fine.
But if I reboot that computer, while the phone is connected, the phone is woken by the changes in power status of the USB port during the reboot, and because iTunes is NOT running at that point in time, iOS 7 panics and asks if I trust the computer.
Even if I don't touch my phone, and wait until Windows is fully running again, with iTunes too - next time I turn my phone on, it asks if I trust the computer.
REPEAT: APPLE, YOU MUST MAKE IT POSSIBLE FOR USERS TO DISABLE THIS NEW "FEATURE".