That game is a VERY adult game. And should not have been marketed the way it was.
How was it marketed poorly? Every ad I've seen mentions very clearly it is rated M for Mature, and show the gang attire, gunplay, and other actions that aren't appropriate for children of a young age.
There was nothing that sai "Hey! Great for kids!" or "Comes with free Pixy Stix!"
"It's marketed towards kids" just strikes me as knee-jerk reactionism to the fact that so many people cant wrap their heads around the concept that just becauise it's a game doesn't mean it's for kids.
Kids arent dumb, they know if they do stupid sh*t they can ALWAYS blame it on video games, movies, etc and get away with it.