Rock Band enthusiasts are a demanding bunch. Some won’t settle for just any controller. They want something to replicate the experience of playing a real guitar. Make no mistake, they don’t want to play an actual guitar, they just want to feel like it.
So, an inventor comes in with a modification kit on eBay that replaces the plastic strum bar of the controller with an actual guitar string. Yup, just one string seems enough!
Maybe the rumor is true? If you give ’em enough time (meaning intinite time) any Rock Band fan will eventually grab an actual six-string.