One reason why I try not to use expletives on wiki is that things can be misinterpreted; I've seen examples of people using a rhetorical example only to find others take it personally.
Another is that not everyone gets the difference between a swear word used against a specific person and one used against a situation; in particular I'm conscious that many people on English Wikipedia are not using their native language and might not spot the sometimes subtle distinction between unacceptable and arguable uses of such words.
Lastly there is an argument for not having a privileged status for "vested contributors" whether admins, functionaries, or editor with vociferous fans; there are times when in just a few sentences you can explain why one use of a swear word is a personal attack and another is a rhetorical statement. But people don't necessarily believe you, especially if it looks to them that you are defending a fellow insider.
Regards
Jonathan / WereSpielChequers
The depressing thing to me is that the English Wikipedia community takes all of 10 minutes to work itself into a frenzy about the use of profanity in a positive, non-personal way, but if an editor on Wikipedia calls a female editor a cunt, no one dares to bat an eye.