Ew... chavs. I've heard the horror stories about them. XD
Anyway, I've never actually cursed before and don't have any plans to do so, but I'm not the type of person who flinches every time I hear a "bad word". I honestly prefer to be around people who don't curse because that's what I'm used to in real life, but I won't have a nervous breakdown if someone slips one out in front of me. I guess that, like most people, I've become pretty desensitized to them because of all the movies and music that you hear them in nowadays.
That said, I don't think it's appropriate how they're often thrown around so carelessly by people who say they're "just words". Sure they are, but they're not the kind you'd hear an innocent little 5 year-old saying. Or your typical, sweet elderly lady. It's one thing to use them when you're with a friend who wouldn't be offended in the least, but if you're out in public, especially around families with little kids? Show some respect. At least you'll come off as being more mature than most teenagers these days.