When the movie E.T. the Extra-Terrestrial was released in 1982, Finland, Sweden, and Norway all decided it wasn’t for children. You had to be at least twelve to watch it. Really. The reason was because it portrayed "adults as enemies of children."
Apparently, some adults in Scandinavia were worried that the only thing standing between them and a wide-scale Children of the Corn-style uprising was a movie about a bunch of kids befriending a space puppet and the grown-ups in business suits trying to take him away. The Swedish Board of Film Censorship thought watching E.T. would plant subversive ideas in kids' heads, teaching them to fear and distrust their adult overlords. It is unclear whether they were aware that most children's adventure stories feature villainous adults, because children generally don't have enough societal clout to be effective bad guys.
There were protests staged by children who wanted to see the movie, but they had to grow up first. That’s just one of a list of six movies at Cracked that have been banned from at least one country for reasons that will make you scratch your head.