I like seeing that they actually have a conscience about some stuff. Like the Bloody Mary episode. They realized that maybe people had a right to be mad. As opposed to say I don't know The Dixie Chicks who don't think people should get mad at them for saying anything.
Matt and Trey own what they say, like it or not ;~)
I don't think that the Dixie Chicks lack conscience about what they say, they just don't understand that taking a stand means you might have to defend what you say, and some people might not like you for it.
I think the only difference with Matt and Trey is they're OK with people some people not liking them... they understand it's part of saying something controversial.