The one movie I have to back up my argument is The Avengers. The Avengers! Yes, the third-highest grossing film of all time. What did people do when it stayed that way? Criticised the movie for being "fun" and too "kid-friendly" - what is wrong with that? Firstly, I'm glad to know that those people actually watched The Avengers, secondly, I need a proper answer to why child-viewers are seen as an irrelevant audience when it comes to superhero films.
Lets say The Dark Knight Rises was the third-highest grossing film, where would people think half of that audience came from? Actually, where do people think half of Avatar's audience came from? I've been saying this before, and these days people make it seem like you have to be 30 and up to watch and enjoy a superhero movie... What does this even mean for superhero movies in the future? Are they all going to be too "dark" and "gritty" for child-audiences? It's just immature for people to call out child movie-goers in a bad way if they did or didn't contribute to a film's success.