Reply to post: Re: How is this done ?

Facebook cuts off independent political ad reviewers, claims security concerns

Che van der Showa

Re: How is this done ?

Agreed. It's how reCAPTCHA's "I am not a robot" tick boxes work. If the user's mouse movements are determined to potentially be computer/bot generated, it makes you go through that awful rigmarole of identifying which boxes contain traffic lights etc.

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