One of the reasons given by Apple for locking down the iOS platform is security. A locked down OS is more secure than one that isn't because it doesn't allow unsigned code to be run on the platform. But what happens when a zero-day vulnerability is discovered that allows the security system to be bypassed that will take days, maybe weeks, to be fixed by Apple has already been patched by the jailbreak community?

Hey! Terrific! You can get yourself a couple of weeks of security against a threat you're unlikely to encounter! And all you have to do is Adrian neglects to mention that small and unimportant tidbit of information.

Of course, it's easy to restore your phone to factory conditions so Apple would never need to know, but here's the other thing about Adrian's suggestion: What's the first thing this jailbreak installs? What's one of the major security benefits of the iPhone ecosystem? The fact that Apple curates the apps.

Who curates all the apps you can get through Cydia?

[crickets]