wolffox
I don't think a post with words using the f letter can be banned. indeed there are a lot of words who use the F letter and are not bad words at all.
Wolffox is a nice example, it has twice f letters, making the word wolffox to be fastly double banned.
Indeed, from now all my future post will freakely have the f letters marked in another color, includding the fluffy word.
D