I've noticed a trend when I see clan members be rude, insulting, and childish in the in game chat. Some of the worst of it comes from clan members who are Commanders, Executive Officers, Personnel Officers, and Recruitment Officers. Do they think about how this reflects on their clan?
I've had clan officers insult me for an entire battle because I pointed out that going valley in Lakeville in a Soviet heavy tank with no gun depression probably wouldn't be as helpful as going into the town with the other heavies.