You would have fought for the confederacy because it was legal to own slaves
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The reason it's wrong is because the device filming is sending data to police and corporations, who frequently abuse the law. People do not have a problem with you using any other camera, such as a phone or camcorder. The problem is the specific device, not filming in general.
Why do you assume it is only happening in public? Since it is hidden cameras, in glasses, they can be recording anywhere (and even if the user hasn't asked them to record explicitly, they are probably sending data back to their servers anyway - we know they have been doing that with microphones for literal decades already).
People have said: facebook analytics, ICE tracking, and a general discomfort with being 'seen' always. You won't accept any of these because you are a corporate tool.
I protest against this for the same reason I would protest against the government flying tens of thousands of drones around the city to track every person's whereabouts and location history. Facebook gives the police unfettered access to their information. It's like a Ring doorbell, but dumber looking and it moves around.
If you're sitting next to me with these fuckass glasses on, then you are giving the government live video feed of me. The only difference between this and a drone that's personally following me is that technically, this doesn't violate the Fourth Amendment because the government isn't the one sending a mindless drone after me with a camera, Facebook is. It's only technically not a violation of my right to privacy, in the same way that deporting people for saying "from the river to the sea" is only technically not a violation of the First Amendment.