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?
I like this idea provided it’s 100% opt-IN and not opt-out. Nintendo’s 3ds streetpass did something like this and it’s very cool being able to see what other people are in your area with a 3ds. A social media focused on this would be pretty neat IMO.