Bah, i don't even care. I've got a .NET passport and I use Windows Media Player to rip, play, and burn my music... MS can track me all they want, or steal my personal info, take pictures of my cat, whatever. I run my computer without a firewall, without antivirus software, and with no form of spyware protection. I've been running it like this ever since XP came out, and I've never had a problem.
The way I see it, all the firewalls and antivirus programs necessary to have a 'secure' computer are too much of a pain to make it worthwhile. I'd rather have to deal with the occasional virus infection or with MS watching my every move.. but I guess that's just my personal preference..