If I see any person wearing these near me or my house, I'm going to personally ensure their headset is shredded to bits. And I'm sure no FB employee will wear this. You can only pay contractors to wear it.
Facebook has demonstrated time and time again that it is an organization that considers itself far above any law or ethical code.
I hope it will be illegal where I live. I don't know if I can afford the legal battle of breaking all devices that approach me, but I feel like someone should do it and fight it out in court.