Sometimes there's just no other way to express the way you really feel.
I read that 35% of people, in a recent Ipsos Poll, said they have never used the F-word. Although, I think 95% of people believe 35% of people lied on that Ipsos Poll.
Here are two articles about it: "Americans see profanity getting worse, poll finds" and "Thinking Specifically about the F-Word..."
There are no limits to the way the word can be used. Personally, I like to use it to emphasize a point. Kinda like Dick Cheney did when he told Sen. Patrick Leahy to fuck off, which was much more effective than saying, "I disagree with you, Senator Leahy." Here's a parody on the exchange between Cheney and Leahy brought to you by those crazy people over at Chickenhead.com and their subsite Whitehouse.org:
The reason the word is so great in the first place is because it's considered a taboo word, which is why people get a certain satisfaction out of using it. I also think it's stupid that the FCC freaks out over a bad word, but has no problem showing violence on TV. Which is worse: Watching a person shoot someone or hearing them say "fuck you." Hmmm...I don't know. That's a tough one. It does show you where our priorities lie in this country. And here's a message to the FCC: When you bleep out a word, we can still tell what they're saying (but I think the FCC knows that anyway). To others who get offended by the word, from what I can tell no one has ever been traumatized from hearing it, so lighten up.