I thought about an idea to recognize the identity of people in Nostr. I called it the freeze check. You put a little amount of your money in a timelock for 10 years. If someone wants to impersonate you, the timelock parameters will show you freeze checked first and the scammer will be discarded instantly. The idea didn't work properly because timelocks could be destabilized by forks. But with bitvm, that could change because forks would be a LOT less likely to happen.