Its just that we can't laugh at anything anymore. Everything is PC. You notice that movies today that go against the grain PC wise do very well. Like last years "Bad Santa". It made fun of kids with bad parents, Jews, black midgets, christmas, etc, etc, and it was a hit. So are movies like Kingpin (Amish Bowler) and even Jackass which makes fun of gays, animal activists, South Park, Family guy, and sometimes the Simpsons.
Imagine today of the Honeymooners played. You would have fat people activists saying you can't do fat jokes, you'd have women activists saying Alice can't go to the moon!! thats mistreatment of women!. and you'd have the bus driver union saying your making bus drivers look stupid.
Why can't we laugh anymore?