Someone has suggested something like this before: create bridged accounts that later can be turned over to the person if they prove they are who they are. Sounds like a good idea. We can actually do it using FROST decentralized key generation. Probably can't be fully automated though, since Instagram is such a dystopia. Maybe we can start with some other source platform? Still it would require some work to select and talk to the targets. And someone trustworthy enough for handling the temporary control of the accounts and taking the flak from the the bridged people who will hate everything.