I had a captain last year that wanted to configure the bleeds wrong in icing conditions... said it was ok. At first I thought he did it by accident.... so I asked him. He huffed and said that's how he does it. I said, well the way I do it is I don't call for takeoff until we configure the bleeds properly. Needless to say, I was quickly allowed to crank the APU back up and reconfigure the bleeds. Pulled out the limitations section of the aircraft once we got up to cruise- said I didn't want to be a jackass but I don't take chances like that with the engines. He backed off pretty quickly... though was overall just a jerk. After a few other situations, I called alpa pro-standards.