The same thing happened at the Wendy's in Belden Village (Everhard Rd.) sometime in the late fall, and a similar sign was posted on the dining room door.
One can only hope that the location was understaffed due to illness of which there has been a lot going around lately. Otherwise, I have no problem with the employees' desire to explain the situation to their patrons. Who knows? The store may even attract a couple more reliable employees as a result of the publicity generated from posting the sign.