Animation is best used to cut through tough topics. In fact a lot of our projects at Happy Trails stem from trying to give a soft presentation to a hard message. If the delivery is too much "in your face" folks will turn off or tune out rather than endure depressing topics, no matter how vital the info is.
However, once in a while there is a short film that tackles tough topics such as child sex trade... this film is probably one of the best films and should be part of bringing the tough topic into a light where folks can discuss and make a difference. Artist's have a way of making communication intriguing.