...uh no? If the camera is physically not pointed at you, it can't record you. It's clear and concise.
EDIT: My exact thought on this subject has been that the camera needs a mechanical shutter. But I'd say thinking of Glass like sunglasses is probably also the way to go - a way to "take it off" without having to take them off (i.e. like when you put your sunglasses on your heard to talk to someone indoors).
I think the failure of this idea starts with the assumption that it's perfectly reasonable to have a trigger-happy camera constantly at the ready, strapped to your forehead, "just in case" but "trust us because we swear we won't point it at you in your most compromised, yet entertaining moment" only everyone else.
But, ma'am, I swear these mirrors on my shoes aren't for looking up ladies skirts. I just have them because I'm in a gang and I need to check underneath my car for car bombs every morning.
EDIT: My exact thought on this subject has been that the camera needs a mechanical shutter. But I'd say thinking of Glass like sunglasses is probably also the way to go - a way to "take it off" without having to take them off (i.e. like when you put your sunglasses on your heard to talk to someone indoors).