Here are the Entertainment Software Rating Board's (ESRB) ratings for video and computer games and what they mean: http://www.esrb.org/ratings/ratings_guide.jsp This rating system was created to inform videogame enthusiast about the content that can be found in a videogame; it's done for our benefit.
I'm already debating about this topic. Do you think I have a good argument? Sorry if it looks messy. I tried to paste a bunch of pictures in there, but the pictures were so big and took so much space, that it screwed up the entire text script lol.