> That's quite an odd thing to say, isn't it?

It's that how many viruses and pieces of malware get around? The user is tricked into installing something and then it goes bad?

Isn't that how most every exploit and virus seen on Android work?

Is that how the problem apps found in the jailbreak app stores for the iPhone work?

Isn't this exact restriction why the worst we've seen on iOS (despite MASSIVE deployment numbers) is social engineering attacks?

I know many people hate the restrictions, but the App Store on iOS has a pretty amazing track record for security (in regard to problem code). Basically the worst we've seen is apps abusing system APIs to get more information than they should and those have been closed relatively fast. No worms, no viruses.