I'm not sure where the puzzle you did came from, but my assumption is that it comes from The A.V. Club, where Mr. Tausig is the crossword editor. The puzzles in that fine publication are the only ones in which I've seen any profanity. If you look at some of the more common puzzles (NYT, LAT, TMS, Newsday, etc.) you shouldn't be able to find any profanity in either clues or answers. Just stick to the more established crosswords, and you'll be fine.
I think Mr. Tausig is perhaps trying to appeal to a younger, less traditionally oriented crowd, who might find his more relaxed editorship refreshing. This kind of crossword is a good fit for the readers of The A.V. Club's parent paper, The Onion, as well.