The original street pass feature of the Nintendo 3DS would let you “passively” play some games with other 3DS players you encountered in real life (even and esp

The original street pass feature of the Nintendo 3DS would let you “passively” play some games with other 3DS players you encountered in real life (even and especially when your 3DS isn’t even opened). That way you would check your 3DS later and see the players you bumped into during your trip. I think OP is suggesting to have a similar thing for Mastodon. Users would keep the Mastodon app running and other users you meet along the way would be added to a list. (I’m not specifically fond of the idea, but just try to bring in some clarity and context here.)