So much "comedy" has to use foul language. I just read a list of things not to say to our Subway Sandwich Artist. They were pretty funny just for how stupid can people be? It wasn't necessary and not at all funny to put an aside calling the customer rude names and use the f-bomb.
Books, movies, many TV shows, interviews - none are immune to this trend. I still blame George Carlin - bet it was a lot before that, though.
I see it far to often on cute pet captions. It just takes a really funny, ironic situation and soils it.