This is the best way to look at it: Don't swear. If someone gets away with the odd swear word, so be it. They can consider themselves lucky. We might have allowed it for something such as a story in the writer's corner, or else we just figured that it was okay for this one time - we have the power to decide on that kind of stuff.
But if you want a line as to when it is allowed and when it isn't, there isn't a line, or if there is it's very hazy. The only way to be sure that you won't get punished is to not swear at all.
Personally, I would only swear in a poem/story in the Writer's Corner, and obviously I wouldn't do it excessively there, either - just in such a way as to show what kind of characters I have in a story.
If you really feel the need to swear, PM a mod/admin showing what you would post and ask if they think it's okay or not. Be prepared for a "no" and don't argue with the decision.
