To protest the latest round of MTA fare increases, the group NoFareHikes is encouraging subway riders to stick it to the MTA by Swipe Back to other riders. (Think Pay It Forward but with Metrocards) If you have an unlimited card, it’s perfectly legal (for now) to swipe someone through the turnstile.
Not sure how depriving the MTA of funds (ie: Swipe Back) helps them out of the budget crisis, but maybe it sends a message. Either way, a novel idea.
For more on the protest movement and to get your free Swipe Back button go here