based on engineering a product that has a power capacity of <2 watt hours, to work reliably and is able to play and stream audio correctly.

To spy on someone using these glasses would mean decent audio stack that can actually reconnect by its self, rather than having to power cycle the entire device.

Not only that, but a level of attention to detail that means that what ever spying it does can happen reliably and inside a tiny power envelope.

Don't get me wrong, I'm not saying don't be suspicious of facebook, What I'm asking is to actually interrogate their level of skill.

facebook are frankly shite at software, just use any of their supporting apps.

o Portal, great hardware, shame that it never connected reliably.

o oculus: They have the power of facebook/instagram/social graph, yet its impossible to join your mate in game. Something Steam nailed in the days of dialup

o Rayban: cannot play audio reliably, pretty tricky to download pictures.

o Advertising: fuck me, its like oracle had a baby with SAP, and force fed it MS access forms.

Yes, yes its an advertising giant. But have you tried to get any usable and accurate data out of it?

Stop building them up like they are an unstoppable genius factory. Its basically a bunch of confused cats trapped under a duvet. The difference being those cats can drive advertising clicks.