I absolutely do not trust any third party - there are some insane apps like LinkedIn that tries to sell your privacy at every corner.
That said, Apple should allow Jailbreaking to aficionados who want to mess around with it. But, there should be significant impedance to that - your average joe working as a bartender doesn't have a clue of how to keep his iPhone secure. Apple should make it explicitly clear - hey! ALL BETS ARE OFF WHEN YOU JAILBREAK OUR DEVICE. CLICK AGREE.