That is an idea that I will implement, since I always use the same outlet from the garage, and a gfci should probably be installed there anyway. John also suggested a fine spray of water for cooling the motor case. I am not certain I want to spray an active electrical appliance with water, although with the gfci I could probably get away with it. I might spray it down when the power is off. One other small thing.
Disposals have a knockout for installation of a dishwasher drain.
Don't knock it out. In sum, look over the disposals carefully before buying, and choose the one with fewest corrosive internal parts, the largest throat, and the most profound grinding chamber. I have to confess I never gave these things much thought before getting all this feedback. Although I am a fiscally conservative, not to say cheap, consumer, I may even buy a better disposal myself.