Ludacris is a Hypocrite.
While he demanded that the Paul Walker jokes are taken out, he wasnt as vocal about "Petes dad dying during 9/11" jokes - in fact, after Jeffs joke about this subject matter, you can see Ludacris, at the very least, chuckling about the joke for a couple of seconds.
Besides, Walker died almost 1 and 1/2 years ago, while Dunn died just 2 months before Sheens roast, and Steve-O didnt pull the same crap even though he didnt enjoy a joke which referenced his friends death. He did ask for a joke made by himself to be taken out, and that is fine, while Ludacris asked for censorship.
"Fighting for peace is like screwing for virginity." - George Carlin