In the USA, many or most speed cameras are owned and operated not by the local police or city, but by a private company that keeps some percent of the fines they give out.
They are contracted by the city, country, or other authority. They are not randomly placed or operated without permission.
why kill anyone? Why not go back to their childhood and teach them to be better humans?
I think this is wonderful logic for a great many situations with a vastly overpowered being. With enough power and patience, all problems can be solved peacefully.
If one were alive during the things that Forrest Gump experiences during the movie. Then seeing those things in a movie with Tom Hanks could cause feelings of nostalgia.