The Cursing Quiz
If you say stuff like " you, (Name)!" you sin. But if you use cursewords that has nothing to do with the bible, and you know noone is going to be offended by it, then you do not sin. I think even Jesus used curse-words sometimes (but I'm not sure.)
Its not the words that count, its the meaning. And let's be honest, does God really care? Yeah, I bet he gets really worked up about it, hence the thunder and lightning. On the other hand, if all you do is swear, you end up not really saying much.