The whole idea is a privacy minefield, so it would have to be very carefully designed and implemented, of course making it opt-in. But still, should we even pursue this idea?
So that, for example, even if I met someone just briefly, they can still later see the contact information that I am willing to provide.
Wouldn’t that make it much easier to connect with people who live close to you?
Are there any relevant projects or ideas that already exist?
GRINDR used to have this feature;. Usually, it was just annoying with randos (who never read my profile and had nothing in common with me) messaging me simply because I’m in the vicinity. Occasionally, guys got creepy/stalky and randomly knocked on neighbours doors trying to find me.
I don’t recommend resurrecting it.