Attaching a dongle seems very suspicions to me, unless it something like a library computer. A library computer shouldn't have any critical data in the first place making the point moot.
This is just stupidity in my opinion. I hope this doesn't go down the slippery slope so far that I see tomorrow that they have put a warrant out for everyone who worked on /dev/urandom because the developers made it too easy to write gambling software.
The most valuable skill I have is literacy. If I didn't have that I wouldn't even be able to know what your question was in the first place. I also couldn't do anything I didn't actually see or haven't been directly written into my genes.
CAPTCHAs aren't very good for keeping bots off websites.
reCAPTCHAs are very good at getting people to volunteer there time to digitize books.
I always purposely screw up on the OCR part of the reCAPTCHAs because I don't like being used for OCR.
It seems to me that the word that isn't curved is the one from the scanned book and isn't validated to check the CAPTCHAs, but instead used to write the book which I hopefully screw up. https://www.google.com/recaptcha/learnmore