No, thats not the metaphor. But its this:
Link here: Road signs warn of zombies | KXAN.comConstruction signs warn of zombies
Hackers change public safety message
Last Edited: Thursday, 29 Jan 2009, 5:12 PM CST
Created On: Wednesday, 28 Jan 2009, 8:29 PM CST
* Shannon Wolfson
AUSTIN (KXAN) - Austin drivers making their morning commute were in for a surprise when two road signs on a busy stretch of road were taken over by hackers. The signs near the intersection of Lamar and Martin Luther King boulevards usually warn drivers about upcoming construction, but Monday morning they warned of "zombies ahead."
I wonder if this happened sa highway sa Mandaue. That would be awesome! People running around panicking about the false road sign.