I think it boils down to people being WAY too oversensitive these days and taking "politically correct" to extremism. I always hated that whole politically correct movement and this is why, you just cant cater to EVERYONE all the time. That old adage of you can please some of the people some of the time, etc seems to be ignored with respect to jokes and whatnot.
I saw it getting ugly when it suddenly became "not okay" to joke about rape and rapists. Then it became not okay to joke about racial differences and stereotypes.
Slowly but surely every aspect of culture is being added to the list of taboo topics and sadly its the population thats doing it, not the government. I never thought I would live in a time where censorship was being carried out by both the government AND the populace =/