Back when South Park turned Comedy Central around from just being some campy repository for third rate guffaw flicks, it did so because it was disgusting and touched taboo topics in a clever, insightful way.
Comedy Central got the message that to be funny all you had to be was disgusting and touch taboo topics without being clever. So they started pushing crappy shock value comedy after crappy shock value comedy like TV Funhouse, Mind of Mencia, and Drawn Together whose modus operandi seem to be just to take the most disgusting, 'offensive' things they can think of and throw them on screen in any order.
Now network shows are doing that too, especially on Fox. Family Guy, a show that used to be clever, is now just about being as disgusting and 'offensive' as possible without putting any real thought into it. And movies are not only doing it, it's getting them critical acclaim.
A lot of this has to be just kickback from the 'politically correct' movement. People are so annoyed at hearing about people being offended they automatically react positively to things that are 'offensive'. But does that have to mean applauding everyone who takes lame shortcuts in storytelling? Throw a bunch of guys obsessed with sex into a room, brainstorm what you think might get Christians to complain the most, put it on screen, and everybody says it's brilliant.
I keep putting offensive in quotes because if you're doing it just because you think it will get you ratings, it's not offensive. It's pandering and cheap. Carlos Mencia isn't 'edgy'. He doesn't say what's on his mind. His producers put a focus group of males age 13-29 in a room and said a bunch of dirty words and racial stereotypes, then measured what made them laugh the most, then told him to say it. That's the *opposite* of being edgy and saying what's on your mind. I heard his real name was 'Ned Holeness' and he wasn't even Mexican.
I can't wait for the whole 'political correctness' thing to end, because when it does, comedy writers won't be able to get away with these cheap shortcuts anymore. (They'll have to find new cheap shortcuts.)