> Are you simply showing me results of "WP7 jailbreak" from Google search without even bothering to actually read it?
Why would WP7 and Xbox be related?
Anyway, none of your arguments for the safety of one or other held. People sideload their WP7/Mango phones with Native/ARM apps and they unlock and sideload programs on their Xboxes every single day (I just confirmed with an Xboxer coworker, and he explained to me that he has a ton of sideloaded games and his Microsoft Live account -- or whatever it's called these days works perfectly).
The only "typical" thing here is that you are putting your hands in your ears and singing "lalala" while people are trying to converse with you. You seem to want to believe so much that rootkits for windows+antivirus or for wp7 or for xbox do not exist that even when I show them to you, you cannot see. You even made the preposterous affirmative that "microsoft cares deeply for security" when the company's record with security issues is the worse possible -- they even make vulnerabilities linger for YEARS until they plug them.