Cursing is pretty common on here. Just re-read the guidelines and there's no rules against inappropriate language like the "f-word"... Especially when considering such a benign usage as the parent comment, ie: just replacing the verb in "mess with" which is not targeting the language at anyone/anything.
It may not be as common as other platforms, but casual conversation does happen here which includes the occasional curse word.
Just trying to inform - I'm sorry you're sensitive to it.