It took a couple of years for the inevitable to happen, but I'm told the guitarist in question was given one of these stickers after a concert in Chicago last night. A friend of mine (and fellow guitarist-fan) saved the sticker all that time in the hopes of meeting him one day. Hilarious.
She said he laughed, but it is unclear on whether he thought it was genuinely funny or whether it was the nervous laughter of someone who thinks they might have a particularly strange stalker...