There are two parts to gaming with each other. One is not being insulting and the other is not being too easily offended.
I myself use swearwords every now and then. I don't sprinkle every other !@#$ing sentence with a !@#$ing swearword like some !@#$ing movies do it just for !@#$ing effect... but then again, when it's appropriate... most of us are adults here, and those of us who aren't in parts enjoy this place because it is not a for-kids environment. Many of the younger players in the game act very adult, and you would've never guessed that they're 14 or whatever.
I don't see a problem with this message if it isn't a constant problem with this player. Everyone gets upset every now and then and he's speaking his mind. He is not personally attacking anyone, either.