Swear words are some of the most harmless words in my vocabulary, and trust me, if you've ever read a post that I cared about, you'll know that it is quite large.
If you take the time to think, it's extremely easy to do quite a bit of emotional damage without one utterance of a "swear word." Calling someone a bitch will do much less emotional damage than telling them that they're worthless bags of meat that no one loves, never will, and are only viewed as a waste of supplies by all of their "family and friends," especially if they already doubt themselves. Which, at some point, everyone does. So. You decide, which is worse: A word which only causes a "swear war," in which everyone involved partakes in a very loud competition to see who can yell the most swear words, or a carefully selected phrase that can cause someone to commit suicide?
As I've stated, swear words mean nothing distinct. They're only clones of other words (or are those words clones themselves? Likely, what with all of the euphemisms around today). I only use these words when I deem my conversational partners too unintelligent to understand the rest of the words in my (or really anyone's) vocabulary.