Electronic traffic signs are pretty important things to observed, even if — more often than not — they’re used needlessly for “Click It or Ticket” purposes. That said, sometimes they’re used for very important reasons, such as warning drivers of the horror of the living dead.
Other times, they can warn people of rampaging animals. Perhaps the sign was hacked. Perhaps there are no actual gorillas in Michigan. Nonetheless, we should all be vigilant of primates on the loose.