The use of satire does not place such shows above criticism, nor does it relieve them of moral responsibility. Several of the shows you mention made careers of mocking civilized values and celebrating slobs. They should be scorched for it. Instead of setting good examples, they are teaching kids to act like dirtbags.
Um...? What in the world?
This show is entertainment, and it delivered exactly that. "M*A*S*H" did not glorify war, or cross-dressing.
No, it didn't, but it portrayed war, communism/capitalism, America and her Army in a way that conformed to a very liberal view of the world. It was to war what The West Wing is to conservatism: It describes a world far different from the real one in order to score points for an ideology. In the West Wing world, socialism works like a charm and the only reason someone like Dr. Laura would criticize the gay agenda is if they're a hateful bigot. In the MASH world, communism is just another point of view, South Korea wasn't worth defending (and of course, neither was Viet Nam) and only a bigoted, cowardly, fundamentalist twit like Frank Burns would be interested in fighting a philosophy that had already killed tens of millions in the Soviet Union. If you've seen or read Band of Brothers, ask yourself this: How many MASH characters who showed any enthusiasm for fighting Communism would be fit to shine Major Dick Winter's boots? How many would be fit to shine Pat Tillman's? A message of "war is funny" was not being sent, but a message was being sent nonetheless.
The "sex with no consequences" message of Friends is just as silly as it would have been for MASH to portray a war without casualties. And while there may not be someone sitting in a room at NBC thinking, "How can I tell preteen girls to get laid this week?" there is a "zero consequences" message being sent, just like a war movie that shows only glory with nobody dying on either side.