Signups and thus CAPTCHA's are automated by the Pentagon's Lords Of Many Profile'ers. How would this stop them?
Importantly, if a site were to do that users would then assume the site to be Shill Free. This would be a False Assumption to make and starting people off on the absolute Worst Footing Possible.
Valid concern. I think the question should be presented with a disclaimer. We must always be vigilant.
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