Kids swearing reminds me of a great scene in Misery. If you haven't seen the film it's worth watching, it's both intringuing horror and somewhat comical (both intentionally and unintentioally). Anyway, romance novel writer Paul Sheldon is being held captive by his insane fan Annie Wilks. She reads a manuscript for his as yet unpublished novel with a more serious tone, and this is her reaction:
Annie Wilkes: It's the swearing, Paul. It has no nobility.
Paul Sheldon: These are slum kids, I was a slum kid. Everybody talks like that.
Annie Wilkes: THEY DO NOT! At the feedstore do I say, "Oh, now Wally, give me a bag of that F-in' pig feed, and a pound of that bitchly cow corn"? At the bank do I say, "Oh, Mrs. Malenger, here is one big bastard of a check, now give me some of your Christ-ing money!" THERE, LOOK THERE, NOW SEE WHAT YOU MADE ME DO!
It's a great scene, mainly because Kathy Bates is so convincing as the mentally deranged Annie. But it does bring up the sort of cognitive dissonance about swearing. What does it really damage? From a philosophical standpoint, it's kind of odd that we humans make words that are considered taboo in the first place. Words have only the power that people give them. For example, others have already mentioned how what's acceptable has changed, and on that subject, I recall talking to my grandmother once about movies she saw when she was a kid. One of them was Gone with the Wind, and when Clark Cable uttered his famous "Frankly, my dear, I don't give a damn" line, she said there was audible gasp in the theater. I can't even imagine the string of profanities needed to make a modern movie-going audience gasp. Actually, I think a string of profanities would have the opposite impact today, people would likely find it absurd at start laughing. So yes, language evolves, but so does society. Perhaps we've moved beyond assigning such power to words. The only exception I can think of is racial slurs, those are more offensive today to many people than they ever were in the past. It's not uncommon to find elderly folks that drop the N-word, not out of hatred or malice, but because that was just what "everyone" called black people when they were growing up. Granted, some elderly folks that use racial slurs are also racists, but it's not necessarily the case either. Things change, and not everyone can or will adapt.