Han Sanders on Nostr: Can signing a timestamped event with your npub, to prove you are already using it for ...

Can signing a timestamped event with your npub, to prove you are already using it for a long or at least sharply defined time, be used as extra in-depth-defense against imposters?

All npubs timestamped less than a week ago are by default untrustworthy, an imposter then needs to have a historically time-stamped npub laying around to be believable.

Also displaying selfgiven nicknames of your follows next to their username would make imposterspam more recognisable.