Are you going to be accepting direct confirmations only or indirect as well?
If you are only accepting direct confirmations, this means you are only going to talk to people who you meet in person. This is totally fine and will work, but then you don't need any new tech -- just ask for their email / phone / nickname on your favorite social site. Or make a private forum (or a Signal/Telegram/Whatsapp group) and invite them there.
If you are accepting indirect confirmation, then once the network grows big enough, there will be bots. Maybe some of your friends meet Greg, director of marketing for Widgets Inc., and correctly confirm him as real human, and then Greg will confirm an army of GPT telemarketer bots as "real humans" so they can do the sales and earn Greg a bonus. Or maybe your good friend gets malware on their computer and their key is used to confirm a bunch of keys without their knowledge.
If you are only accepting direct confirmations, this means you are only going to talk to people who you meet in person. This is totally fine and will work, but then you don't need any new tech -- just ask for their email / phone / nickname on your favorite social site. Or make a private forum (or a Signal/Telegram/Whatsapp group) and invite them there.
If you are accepting indirect confirmation, then once the network grows big enough, there will be bots. Maybe some of your friends meet Greg, director of marketing for Widgets Inc., and correctly confirm him as real human, and then Greg will confirm an army of GPT telemarketer bots as "real humans" so they can do the sales and earn Greg a bonus. Or maybe your good friend gets malware on their computer and their key is used to confirm a bunch of keys without their knowledge.