New Age Grafitti?

In most (all?) Starbucks stores, there are now these magnetic boards. Presumably, the store or patrons (with permission) could post information on them, but the majority I've seen are blank, except for the "We Heard You" memo held up by a single magnet (see below). Then, in the store closest to my job, this appered:



"NSDC Voyagers '09 was here!" written on the back of a receipt. Cute and innocuous, as far as these things go. I figured store staff would take it down when they noticed, but no... it remained for a few days, and then this:

"Thank a vetran today!"-- a nice sentiment, but they did cover the "voyagers" message. Two was too many, however, and both notes were gone the next day.