Government propaganda: traffic laws
In this post, you can see a screenshot with a fear-mongering, but provably false argument. The reality is that, if you remove traffic signs, traffic regulations and traffic punishments, people naturally drive at safer speeds and more defensively. And this has been tested in practice too.
This is a prime example of propaganda -- a complete lie, force-fed to people using extortive and corrupt techniques, and used to justify more oppression and punishment against people, to keep them in a state of perpetual defenselessness and dependence.