For as much Glass hatred there is in public places, the Glass design will either be driven to become invisible and covert or modified so that people can have a sense of what the camera is doing.

Glass should shine an extremely bright red LED when the camera turns on and fades out when the camera is off. Of course, things are always hackable and there will still be little trust of all hardware.

I sense a future market for miniature pirate's eye patches just for Glass cameras.