Sure, everyone can see they’re wearing glasses. However, outside of our little tech circle, most people don’t know that those glasses contain a camera, mic, and location tracker. And even if a Glass-wearer gets called out, they can deny that they were recording or taking pictures (unlike if you point a camera watch at someone).
You could do much better by getting rid of the HUD entirely and embedding just a camera lens/sensor, which can be really small, into some normal glasses ... for spy pictures you don't need perfect composition ... 😓
