Well, I guess we'd better hope that no one uses any foul language then. If this is a reference to my earlier post then I think you'll find it hard to characterise that as "foul language". Abusive, possibly, if it is taken out of context, but certainly not foul.
I understand your frustration. If i was in your shoe, i would have been even more angry. The issue is not about whether what have been said is abusive or foul. It is about trying to moderate to prevent the issue escalating which may end in some problems.
Remember we all here for the same cause (or at least most of us)