content: As we've been repeatedly shown, opting out is no guarantee of being excluded from a product/service/tracking/cookies/whatever_other_personal_violation. Honoring optout is voluntary, not a requirement. MS can change or violate it's policy with impunity. They will never face penalties for doing so. So, not only can they ignore your optout, they can pay special attention to you because you flagged yourself as being interesting. It's like using TOR, VPNs and strong encryption. All you do is make yourself a higher priority target for intrusion. If you're going to do that you better be absolutely certain your systems are hardened and your practices are minimizing exposure in the event security is breached. Maybe I'm being paranoid, but... What do you call security measures that aren't paranoid? Weak. If you're going to optout, assume that optout is being ignored and some attacker will attempt to use it to compromise your network at some point in the future. Take measures that ensure their failure.