My Q1 entry has a couple of F-bombs in it. I debated editing them out before sending it in, but then decided that they really were artistically essential.
There's one story I vaguely remember, I think it was in Vol. III, in which a character has a breakdown and screams, "I'm not an effing child!" -- to which the other characters respond with great concern because they've never heard her curse before. I suspect (though I have no inside knowledge to support this assertion) that the "effing" was someone's clumsy attempt to remove an f-bomb.
I'm operating on the assumption that my story won't be a winner, but we'll cross the bridge of how to deal with the f-bombs in the anthology if we ever come to it.
To make a long answer short (too late!), I'd suggest, as a general principal, not to use language you couldn't use on TV unless it's absolutely necessary. If you can take it out without hurting your story, you should do so. Especially in WOTF which markets heavily to high schools, making it more on the "family" end of the "general" audience seems prudent.