Rule 2.2.g bans "Use of vulgarity, profanity and any technique that skirts the language filter." Accordingly, most words I knew growing up as "swear words" cannot be posted on these forums. A usually strange sounding synonym is inserted instead.
There's an exception though, the three-letter one starting with "A". I've been noticing it more and more lately. I realize this is a subjective thing and we'll all have our own point of view, but to me it makes the forums look like a place where vulgarity and profanity are welcome.
I suggest this word be replaced with "donkey" when found in a post.