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The big difference is that if a woman wears a camera to make her feel safer, she'll do it in a way that it's obvious she's recording. The whole point is to make potential attackers aware that they're being recorded. A gopro or a cell phone camera body mount works a lot better for this than meta glasses.

I live in Canada (many dark months) and am a woman who knows many women and I've never known anyone to wear a vest with a light on them. I do own a hat with a light that I use when I'm walking to the gym in the dark so that drivers will see me, but so do many of my friends and it doesn't seem to be gendered.

I also fail to see how facial recognition would be analogous to lights in terms of safety or frankly anything else.

I can definitely see women not wanting to be facially recognized as they're minding their own business and walking home from work and not wanting to be stalked.