First Place, idlest threat contest

When driving though sparsely inhabited parts of the country, the following sign is often seen:

Speed monitored by aircraft

This is apparently meant to stop people from speeding, or something. But does anyone actually think that the government is dispatching aircraft simply to monitor our speed on the highway? And that if they do catch us speeding in from their aircraft that they are going to do something about it? Like maybe bomb my car?