Also it forces users to perform unpaid labor for Google.
0: https://www.google.com/recaptcha/about/#combined-table__tabl...
You don't want them scraping 1000 articles an hour? Just put a limit on viewing 20 articles an hour, no need to differentiate between human and robot.
The boundary between humans and robots will blur over the next few centuries. At some point it will just be a spectrum from all-inorganic to mixed to all-organic beings that roam the planet. We might as well prepare for that future by abolishing chemistryism (discrimination against organic vs. inorganic chemistry of a being) today.
(Yes this sounds stupid, but 200 years ago, abolishing racism sounded stupid too.)
I'm mostly human and I don't store cookies.
Guess what, folks, every visit to your website involves some mix of humans and software. Nobody uses the web without a browser, and every browser was written by a human. You aren't entitled to make hair-splitting distinctions and dump the enforcement burden on the public.