There are people out there whose reckless driving puts other drivers in danger, whether they are texting or talking on the phone while driving, intoxicated, driving too fast, or simply disobeying the law.
After their family dog was killed, one family decided that enough was enough of the reckless driving and speeding in their neighbourhood, so they decided to put up a giant sign on their lawn that had everyone talking, especially because many saw it as a threat.