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That was exactly my concern: Somehow I'm just not comfortable with the thought of them having these pictures of me... kind of silly but still...

What are you afraid of them doing with that?

Security cameras and such record you all the time though out in public. I presume there are many random servers containing video where you are blinking.

I'm happy to send a gif of me blinking to any attacker who wants it.

Same realisation here. This is the only time I have ever granted camera access to a website. And even though this is a legitimate project, I feel as if they can take advantage of that access.