Let's say you're walking down the street, laptop safely stowed away and come across this:
Like the forbidden fruit would you immediately think, yeah, I'm going to plug my laptop into this?
There is a guy named Aram Bartholl who has created "dead drops" with USB connections in places around NYC and wants to create more of these:
‘Dead Drops’ is an anonymous, offline, peer to peer file-sharing network in public space. I am ‘injecting’ USB flash drives into walls, buildings and curbs accessable to anybody in public space. You are invited to go to these places (so far 5 in NYC) to drop or find files on a dead drop. Plug your laptop to a wall, house or pole to share your files and date. Each dead drop contains a readme.txt file explaining the project.
http://datenform.de/blog/dead-drops-preview/