I keep seeing all these people saying that they are worried that if they jailbreak their device, their warranty is void. Although that may be true, what is to stop anyone from just restoring their iPhone if they run into any issues that warrant a repair? Is there something i'm missing here? I've had my iPhone 3G replaced after it went black. I was still able to restore it, and they had no idea of the jailbreak. What is everyone afraid of?