Hollywood suffered under strict content control and now has shed those restrictions: What restrictions do you think are reasonable for movies. Why?

Hollywood has gotten under large restrictions for some of the movies they make, and for good reason: Some movies are just to much for the public eye.  That does, however, limit the movies that can be made.  This is why we have movie ratings so that we can avoid such controversies among complaining parents sending their children to a movie with nudity and violence simply because of they're bad parents.

Now, I do believe that some movies need to be restricted.  Movies that may as well be sex tapes shouldn't be movies at all.  A movie needs to be something that an audience can enjoy.  Movies have a great potential of being an art, but filmmakers seem so focused on blowing things up and decapitating heads that movies are just becoming a thing of only violence; that however, is an entirely different matter.  

Movies with things like: To much nudity (Movies aren't sex tapes), Nonsensical violence (Violence with no meaning is nonsensical: There needs to be meaning behind what you do in a movie, not just blow things up for no apparent reason), or influencing a single point of view (Politics, religious, or otherwise) shouldn't be movies at all.