In at least one forum I know, the FAQs mention a ban on 'cartoon swearing' i.e. rows of "@~&^%$!"s - I suppose that includes "********"s as well. If people really can't think of anything to say without decorating their script with this form of punctuation, it is gently hinted that they might 'go elsewhere'... Bearing in mind the nature of the forum, not a problem for most users.
Illustrates the impoverishment of the English language in our 21st century culture, doesn't it? However I have been known to insert a few f***ing swearwords myself, especially in reported speech from cab drivers!