My favorite is when they showed a gender reassignment surgery on TV and, at the precise point the editors determined she had transitioned from a man to a woman, they blurred out her nipples.
http://jezebel.com/fox-news-blurs-the-boobs-on-a-picasso-pai...
http://forum.rpg.net/showthread.php?377387-The-Etiquette-of-...
http://www.reddit.com/r/AskReddit/comments/jsgeq/would_the_f...
http://techliberation.com/2006/11/07/nipple-indecency-is-com...
If someone could dig up a youtube, that would be great.