request: optional profanity filter

I suggest implementing a profanity filter (toggled at each user's discretion) to filter any tweets that come up (whether on one user's page or a search). I enjoy browsing searches/trending topics but am disgusted at the nasty and profane vulgarity that's so common in them. Obviously the filtered version would only display to those who choose to turn the filter on, and hopefully shouldn't be too difficult to implement.