Do you think writers should be allowed to swear in their works?

Writers affect language. They are supposed to show us how to speak eloquently, to shape the language in the most beautiful way. Readers should learn how to speak from the writers.

But then again, writers are artists. Art should not be limited and censored. An artist should be free to express himself. Swears often can give a very special affect to the meaning of the statement.

So, what do you think? Should the writers be discouraged from swearing in order not to spoil the language, or should they be let to swear, because it is their artistic freedom?