Hacking just isn't for computers, it can be used for all kinds of fun things. For example, you can use it to scare motorists about a pending zombie attack, as one clever person found out.

(Traffic Controller Bruce) Jones, who has one of only two keys to the locked access panels on the portable signs, said that the hacker broke into the panels [arguable] on each sign and bypassed the passwords before leaving five different zombie messages and even changing one of the passwords. Jones said he had to wait until 8 a.m. to call the manufacturing company to figure out how to override the hacker's work. He speculated that the hacker could be a computer genius from UT.

Not exactly sure why he suspected the hacker is a computer genius from UT. Does he have someone in mind? Has there been a group of loud and vocal zombie activists stirring up trouble in the area? 

Hopefully this is the start of a fun new trend that makes driving to work more fun. Yeah, I know M-14 is closed, but I'd rather see something telling me I'm about to be devoured by brain-dead mutants if I keep on my present course.

[Source]