It is illegal in the US for Apple to void the warranty on an iThing just because the user has jailbroken it, but the gutless FTC won't act to stop it.

Maybe users can start a class-action lawsuit about this.

One reason why it is necessary to jailbreak an iThing is to bypass Apple's political and commercial censorship of apps. However, a jailbroken iThing still trashes your freedom, and what you should really do with an iThing is get rid of it, for your own freedom's sake.