I guess don't understand why some folks don't just simply unplug the compressor when they decide they don't want A/C anymore. As long as the clutch isn't energized, only the compressor pulley itself is turning, not the compressor. Normally, it should spin freely not adding any more or less load to the engine than any other idler pulley. If you take the belt off and spin it by hand, it should be next to nothing. I guess one benefit would be that you might save 15 lbs of weight, but thats about it.