User blog:SonicFan/CN Shows with TV PG rating

Shows from Cartoon Network used to wield a TV-Y, TV-Y7, or a TV-G rating but then some cartoons have had a TV-PG rating.

Here are the shows that carry the TV-PG rating: What reason could there be for these to gain this rating?
 * Adventure Time
 * Regular Show
 * Generator Rex
 * Sym-Bionic Titan
 * Robotomy
 * The Problem Solverz
 * Secret Mountain Fort Awesome
 * Star Wars: The Clone Wars
 * MAD
 * Young Justice
 * The Looney Tunes Show
 * Green Lantern: The Animated Series
 * Thundercats (2011)
 * Dragons: Riders of Berk