Let me begin by saying that I was raised in a home where no one ever swore. I did not hear my parents say anything profane, or even coarse in all my growing up years. So, I know that my view on this is most certainly effected by this.
But I do find the use of profane language to be off-putting, and when it is done continually absolutely disheartening. Anger and every other emotion can easily be described or expressed with words that are not profane. I won't stop reading a book if I run across the occasional F bomb, but if a character is continually talking like that I have a hard time hanging with the book. The best example I can think of is an old classic movie "On Golden Pond." For the life of me, a movie I should love, comes across to me as fatally flawed because of one character's continual use of profanity. I think making it worse was the fact that he was a college professor, who should have been more eloquent enough to express himself outside of profanity.
Now on a certain level I know that this is somewhat stupid. I read a lot of military SF and there is often killing is job lots, at least in parts of the book. And I'm not off put by that.
So for me, the answer to the question is yes, I am offended by swearing.