Art, Camel and Copyright Infringement
In 2000, R.J. Reynolds' Camel brand altered one of Ms. Stehrenberger's drawings and used it in a marketing campaign without her permission. Ms. Stehrenberger sued and recently reached an out of court settlement with R.J. Reynolds.
Keep an eye out on her website, she promises a "behind-the-scenes peek at the pre-trial strategy and some humourous how-tos for how to protect your own work once an infringement occurs."
Tip, make sure you register your work with the U.S. Copyright Office.