The movie had its moments, but the reason it was stupid was that it tried to make the world some sort of fascist propagandist dictatorship, which is not what Heinlein envisioned. I reread the book a couple of weekends ago in preparation for next school year’s discussion with my AP Gov’t class. I’ll likely read it again a couple of times over the summer as well.
The book was boring, the movie was hilarious and had excellent nudity. Do you want to know more?