I swear all the time... everywhere. Everyone else does pretty much, so I never offend anyone.
Swearing has become a part of my language, although I do pay extra attention to what I say when I am at work.
I swear to people my age but not to people much older.
Swearing is just a way of expressing your point with a lot of resolve. Personally I think they are a very good way of showing how much you believe in something, but if more people swore the words would lose their effect (just as 'I'm dying for a drink' now could mean you are just slightly thirsty) so the taboo around profanity has its advantages.
Excessive swearing is a prime example of the typical youths who try to find ways to be accepted in the society (wannabe-gangsters, and et cetera) -- I greatly look down upon those kind of people, especially as it adds to the claim that they, in fact, do not have anything of any significant relevance to add, and merely use swearing as a 'sentence extender', so to speak. Individuals who employ swearing on a more normal level are something which I am not bothered about, as I find it to be a common verbal tool for underscoring certain points -- although the meanings and personal interpretations may differ from the variety of groups that people nowadays are classified under (e.g. jocks, geeks, et cetera).
Personally, though, my use of swearing depends on the situation. If I'm with my friends and there's no 'outsiders' out to listen to the conversation, we are disgustingly good at swearing, and we're very foul-mouthed; however, it is more of an inside joke, that I doubt most people who are not a "member" of our "group" to understand. When I am with my family, acquaintances, I still keep my ordinary behavior, and my usual undertone of sarcasm and dark humour, but I still do not resort to swearing. The only time I swear in the presence of others are when I'm hurt or, well, yeah, ordinary situations.
I agree with Saquist - communication is a gift - and shouldn't be abused. I don't swear very often - but even a little is too much.
Swearing is boring... using silly words instead is more interesting.
You dirty little smelly Zebra!
Also, I think the curse words are not to be taken seriously... there are more important things going on in the world.
I prefer to not swear. I swear a lot less then other people at my school. It's boring listening to a person that swears often.
Swearing is only for the uncreative and the angry.
I didn't make it!
I'll also point out that I don't swear at people. I usually swear as an exclamation. For instance let's say I go to school and my friend reminds me about some homework, and I realize I forgot to do it. A common response to that for me would be to place my hand my head in that sort of "I have a headache" look, and then say "Ah, dammit."
But I don't ever tell people to fuck off or even to go to hell. At least not seriously or with strangers. Might say it to my friends if I'm just messing around with them but that is different.
I only swear when in sudden contact with pain or have experienced and/or seen something that is in a shocking manner. Apart from that, I never fucking swear.