[j. d. worthington]

It depends on how much there is of it and how extreme it is. Such, if used properly, can add to character, it can also lighten things at particularly grim moments, if the expletives are a bit odd. I wouldn't just pepper his language with the harshest terms, but a lot of characters in fiction use such words a fair amount... they just don't tend to be the ones that modern people find all that offensive when they're used that much, unless it's really necessary to drive home a point about that character and make him (or her) thoroughly unpleasant....