Re:Sound? (Score 1)

And, most important, provide a human-to-human contact method as a fallback to prove your species, if everything else fails.

This is the thing. Add a contact phone number or webform for human-to-human request to create an account. What about this form? Instead of using ABY rendered as graphics: The first letter in alphabet, and its follower, and first one of positive answer (3 letters)