And by language, I generally mean profanity.
Now, don't get me wrong, I fully support the rule against swearing in discussion threads and conversation and the like. That's just polite. But when it encroaches into fiction and the characters and dialogue therein, it begins to get restrictive. It's hard, for example, to write a decent underhive story if the characters are restricted to saying 'feth' or 'fug' instead of 'fuck' and other such 'oh biscuits' levels of made-up-words-to-censor-what-it's-plainly-obvious-they-should-be-saying. I mean, is your average hardened ganger really going to be saying 'oh sugar'? It kills a lot of the attitude and atmosphere of the piece, and all-too-often I find myself just writing normally in the language the characters would use, and then having to go back and edit out profanity and consequently send the whole thing into nursery school.
Of course, I'm not saying that profanity is by any means necessary. Most of the time, you can convey the message without using it. But in some situations, it's right to use. That's why we invented the words, after all.
So yeah, are we PG-13 here, or are we grown-ups?