Are Comic Books For Kids?

I wanted to chose a subject that has been talked and discussed since the  birth of comic books. Are these "pages with pictures" for kids? So let's start this with a search. Back in 2011 Grapchic  Policy conducted a survey using Facebook that looked at the demographic  of comic readers based on the total population of Facebook users in the  United States who "liked" comics  on Facebook. That total number came to around 1.2 million individuals  in total. This data was then broken down first by gender and then by  age. According to this data (which is really skewed and problematic), 31  to 45 years olds "out-number" the "17 and under"  population by a pretty wide margin. Readers ages 18 to 30 that were  surveyed came in at around 771,340 while readers "17 and under" tallied  at 168,280. 

The published  comic books are not only rated E, actually the most part of the comic  books that are published are rated PG-13 or even rated R. This kinda  comic books were coming out since 1980's,  like punisher and deadpool. Comic book industry is not about Tommiks  and Captain Swing and it is not all about superheroes contrary to  belief. Like the popular comic book and the television series since  2010, The Walking Dead. The publisher of this series  is not Marvel or DC, its an independent publishing brand named Image  Comics. Well of course a big part of the income and popularity surrounds  Marvel and DC, that's a no brainer. These juggernauts have been top of  the mountain for way too long, since 1930's. I  can ramble about this for an hour, but I don't want this page to be a  wall of words. So I'm going to try to keep this plain and simple.
 

 "Stop over-sexualizing women in comic books!"

There are some sophisticated comic books too that are really  hard for a kid to understand its heavy language. For example; Sandman,  From Hell, The League of Extraordinary Gentlemen, Swamp Thing etc.  Mostly released by independent publishers. some  of the comic books are considered as art and literary. Even the classic  books converted in to comic books, Franz Kafka's "the metamorphosis"  and "the trial" can be considered as examples.   
 

So let's go  back to the original question: do you think that sometimes comics are  too graphic? Should the ratings on the cover match what happens on the  inside of the issue? Do you think that many  of our superhero comics are still written with younger readership in  mind, or do you think they are mainly being written for adults? I made  my points, it is up you to decide.