Glasses for perverts huh? My dad was considering glasses like this (not necessarily meta) to help with his macular degeneration. They can read out text in front of them, zoom and useful stuff like that for people with vision problems. But now he won't even consider it because he's worried he will be labelled a pervert if he is seen wearing them because apparently no one can conceive of a reason why smart glasses might be about more than spying. So he has chosen going slowly blind over having people shout at him in the street. I don't really blame him but I am sad for him that a viable aid is now so stigmatised he is afraid to use it.
That said I do not trust Meta and fully expect them to use the devices for spying and harvesting data even if the wearer does not.