Obscene Language

I usually dont mind reading books with obscene language. Since I know pretty much all the bad language that one would use, it doesnt really bother me that much. Unless it is like The Departed, where every other word is inappropriate, I wouldn't mind it. I know certain words may bring offense to others, and it is hardly ever necessary. Also, there are certain words that many people don't find offensive, and there are some that cross the line, and should not be used.