I'd say it's easier to covertly film someone with a smartphone than with glasses that have a lightup LED. With the smartphone you can just angle it to look as if you're casually holding it or using it normally.
Pretty easy to block the led too, though.
Are we arguing about what the creepiest way is to film people on the streets? Who would want that in the first place?? I don't need encouraging creeps... I didn't hear yet "filming the ICE" as a argument - probably the only one I could understand, but there the problem is not the glasses anyway (nor the solution).
> angle it to look as if you're casually holding it or using it normally.
So you film the ground?