"But aren't comics for children?" Let's put that boorish question to rest shall we?
Yes they are. And they're also for truckers and goths.
As this thread demonstrates, nineteenth century comics weren't aimed exclusively at children and later comics were created for children just as films, books, television programs, plays are created for children; there was no inextricable link between the medium and its intended audience.
The chief thing that has muddied the waters is the whole skerfuffle over censorship that resulted in the Comics Code Authority and a couple of decades of insipid storytelling. The 'villain of the piece' was one Dr Frederic Wertham; his concerns were well-intentioned and not unfounded but his actions did result in a comic book wasteland where even the most enduring characters became shadows of their former selves.
Normal service has been resumed and the CCA is now a toothless tiger but, with both adult-oriented and children's comics being published, how does the skinhead comic book fan avoid the embarassing spectacle of being caught reading something brought to him by the letter e?!
Here are some telltale features of comics produced for the kiddie market:
Now this won't, and can't, provide a guarantee that you won't end up buying something not meant for mature eyes - any more than the more usual reverse concerns can be addressed absolutely. There was a 'boy's own' feel to all the British comics, even though some stories could be enjoyed by adult readers. But, with the growth of a fandom that continues to seek out the back issues they missed when they were first collecting, it is inevitable that there will also be more 'sophisticated' newer books produced to capture the market.