[Doubl]

The demonstrators in Hong Kong are very aware of this technology. I hope the masks and the umbrellas they use are effective but I doubt it

[llarsson]

Gait analysis (how a person moves around) is definitely also used these days, so the masks may make it a tad more difficult, but certainly not impossible.

You know how you can tell that a person walking in the distance is your friend, even though you can't see their face at that distance? Yeah, so can algorithms.

[iiuytrty]

There’s also gait analysis, so unless the rioters can disguise how they walk, it will be difficult to hide.