Originally Posted by
2StgTurbine
Most jets give a warning at 10,000 feet, so you should have time to turn on the bleeds before they drop. Also, I would rather have to deal with masks dropping every once and a while than not making a required climb gradient due to fuselage ice.
Watch out with putting the bleeds on at a higher altitude. On some types of planes you are going to be popping people's ear drums.