I think people on Facebook try to organise big meet-ups to have mass-streetpasses
It kinda reminds me of those organised sex orgies exclusively for AIDS sufferers.
( Edd: The Unfunny Try-Hard Edgelord, Mon 20 Jun 2011, 10:42, archived)

Better that than pressing yourself up against school playground railings
hoping one of the kids comes close enough to give you a StreetPass hit.
( Aardvark and so at last, I understood, Mon 20 Jun 2011, 10:51, archived)