Ok, not really, but commuters did see this sign on their early morning drive earlier this month. It seems the "impenatrable security" of the sign was sliced and diced by a hacker. While endangering the safety of the motorists, this made me laugh when I first saw it. Cute.
I imagine most people ignored the sign, believing that there is no such thing as zombies. Wouldn't they have been surprised to show up at work and find a shuffling mob of undead. (Well maybe not if it was a Monday.) Note to emergency personel, don't use these signs in case of actual zombie attack. No one pays attention.