5 links have been added on this idea.
  1. This technology raises serious privacy concerns, especially if it falls into the hands of creepy individuals or dictatorial governments.

  2. This company has made discreet facial recognition smart glasses!
    https://www.theverge.com/2019/6/10/18659660/facial-recognition-smart-glasses-sunglasses-surveillance-vuzix-nntc-uae