"Passengers can register to vote through the plane's in-flight entertainment system. You activate the in-flight Internet service on your smartphone, scan the provided QR code, and let it whisk you away to a voter registration page."
We have observed from past campaigns that more users scan QR Codes in spaces where they have greater 'down time'.
For example we have found that QR Codes at a restaurant table gets more scans - probably because customers have 'time' and often looking for things to do.
This story is similar. Virgin America has inflight internet- makes their plane seats a very fertile medium for great QR Code campaigns!
Similarly trains offer another attractive opportunity:
http://blog.qryptal.com/2012/04/in-spain-trains-offer-first-chapter-of.html
