Employers should be entitled to hire and fire as they like but this was a bit thin-skinned:
"A judge has sided with a man who was fired for posting a "Dilbert" comic strip that made fun of managers on an office bulletin board.
David Steward was fired from the Catfish Bend Casino because management found the cartoon "very offensive," human resources director Steve Morley testified at a recent unemployment benefits hearing. The casino had challenged his claim for unemployment benefits.
"Basically, he was accusing the decision-makers of being drunken lemurs," Morley testified. "We consider that misconduct when you insult your employer."
Source
Challenging his claim for unemployment benefits was pretty nasty.
Further comment here.
