I have always done the entire aircraft with anti-ice too. I don't want to have to worry about what the top of my fuselage looks like after a 20 minute taxi. Some of the ERJ doors leaked a little, but we just made sure to tell the FA to step away from it. And I don't see what is wrong with taking off unpressurized. As long as their is sufficient training, what is wrong with turning on the bleeds during the after takeoff checklist?