I had a wonderful, unique life experience several years ago when I interacted with and made friends with some members of the deaf community, some of whom attend Gallaudet university, located in Washington DC, the only liberal arts college for the ASL community in the world. I actually have a couple deaf and hard-of-hearing friends who could be interested in POH. So there is some demand and interest. The hard-of-hearing friends and deaf people who weren’t born deaf can usually vocalize, and could probably attempt the phrase “I certify that I am a …” but the born deaf are usually mute.
The deaf community is very tight-knit. There isn’t a lot of overlap between the hearing and deaf communities. It’s pretty clear that a network of deaf people who vouch for the deafness/muteness of other deaf/mute people would have high connectivity. Perhaps to ensure robustness, proof of muteness would require many vouches (5+? 10+?)?
Then only those registered in the POD / POM (proof of deaf / proof of mute) registry could register for POH without the voice requirement.
A genisis set of deaf/mute people who vouch for other peoples deaf/muteness? Is there even enough critical mass interests amongst deaf/mute people to start such a network? Is this pulling the cart before the horse? Or is this a chicken and egg problem where deaf/mute people are routinely excluded from hearing communities including the blockchain and ethereum communities. If deaf/mute people are always excluded (in many aspects of society), then they will never find out about the greatest innovation (blockchain) in society since the internet and printing press.
Maybe POH needs a more comprehensive solution to all humans who cannot participate in POH for one reason or another (partial face paralysis due to stroke, homeless and cannot manage private keys, children, other handicaps). Perhaps POH could be inclusive in $ubi issuance, but more selective in the $vote distribution as commented on the cases of children (danger of perverse incentives) and homeless with guardians/care takers/ ‘do gooder’ organizations