As Mike said, every member should report any instances of inappropriate language when you see it. It almost always has to be disguised to make it past the language filter. Some very mild "swearing" isn't worth reporting, but the ones where letters have to be substituted so it doesn't turn into **** should be reported. That includes posts that already include the filtered **** words.
Maybe a definition of "mild swearing" should be given here. We don't get too upset when members use words like damn, hell, or even ass when not used to describe another member. Disparaging any TFL member is never a good idea. Note that the words I mentioned are not filtered words, so please don't insult us by trying to disguise those words (e.g., he!! or @ss). It just looks childish.