People have always used expletives and foul language in certain situations. I see a a rising trend among people in Western societies to use such words anywhere and everywhere. The editor of a literary journal is compling an international dictionary of verbal abuse. When he sent his list of words and phrases to me, I was first amused, then uncomfortable.
Overuse of strong expletives tends to annoy and upset me. It may be 'cool' or 'fun' upto a point. But foul language tends to lose its impact if used indiscriminately and frequently. They become just a lot of words used, IMHO, by people who lack imagination and frankly dont care about expressing themselves more appropriately and effectively. They don't make much sense and seem to me like so much jargon or gibberish.
If certain individuals choose to pepper their speech with dirty words, we as writers do not need to emulate them blindly. We can and should use our discretiton and explore more creative avenues for expressing ourselves. A writer can use gutter language when it fits a fictional character or situation. We need not avoid real issues and be coy. But I don't see much point in using vulgar words and phrases everywhere, certainly not as a statement of literary style. That purpose would be better served by the immense power of the understatement, by imaginative and innovative use of metaphors etc. That is the way we can show our creativity, not just by repeating a stream of hackneyed, overused bad words.
I also see that I could write a (hopefully) sensible post without using a single 'cuss' and I also see that I had to think harder instead of blindly using words that, by overuse, have become trite and banal.