I'm another with a blind friend who finds them really useful, so if you're going to petition against them, please ensure it includes an exemption for people with a CVI or similar.
As for national security- I work in a defence related role. Cameras on laptops are disabled, and any phones, smart jewellery etc - anything that can record or use Bluetooth is banned from the office. We have lockers to put them in outside the office. So smartglasses are covered by that policy. Security breaches around this sort of thing are taken massively seriously.
(And yes, it is a pain if the GP or someone wants to call you.)