I've have a character that received vulgairyt because he was offensive, abused of cursed words... or even because he was chauvinist at some opportunities. In some of situations, a vulgarity because of the three at the same discussion.
And when I said I loved when I saw his messages being displayed as vulgarity, they stopped. Sometimes I felt it legitimate but some times are purely from OOC behavior reflected in game. They were not just judging the character and his personality, but what they, as players, don't like to see.
And yes, sometimes they used vulgarity in more exalted strategic discussions just to spread it to the entire continent. A shame.