As for vulgar words I suggest listening to George Carlin, he gives a good explanation.
Though there are many reasons not to use bad words I have to object to the grammar part mentioned. Almost all curse words are simply Interjections which is the simplest of all wordclasses.
Is the "d" word even a cuss word? It is simply a word stating someones spiritual status. Someone can be condemned, it means the exact same thing yet we do not think its a cuss word.
Attacking words is meaningless they mean exactly what you say they mean using swedish as an example:
Tjej today means girl, it started out meaning prostitute and was used to the point where everyone started calling women it. Today it has nothing to do with prostitutes. Instead we use Hora, which infact started out meaning something along the lines loved. Now women have started calling each other it in a "playful" manner and sooner or later it will end up meaning girl.
So banning bad words or blaming the words themselves is nothing but a ridiciulous attempt att controlling others language and by that their minds.
If you need more proof there are the trials against rock music, twisted sisters among them where Dee Snider got accused by Barbera Bush for writing lyrics that promote suicide and blasphemy. I sadly can't remember his exact quote but more or less: This song is about our baseplayers fear of a surgery that was scheduled if you find those things in our lyrics, it's in your own mind and if you are thinking those things, you are the one we should be afraid of.
In short: Words are not bad, there is no such thing as obscene language, it is as pointed out by the previous speaker how you use them. If you start calling someone prince everytime he screws up, how long before it's a cuss word you think?
Now that being said, don't take Gods name in vain and don't be rude or mean to people.
