[cbhl]

Perhaps, but the cameras on the VR headsets will provide even more data for the government for those who don't have an anonymous face; especially if the data is sent to a central server for processing (ala Google Glass).

Plus, unless you build the hardware entirely yourself, the headset won't save you from other tracking technologies. Presumably the headset will have a wireless chip whose MAC can be tracked, or, worse, it'll have an RFID chip specially-built for government tracking.