How much energy is needed to mechanically open the door? How many calories does it take for a person to open a door? Are people really that fat and lazy?
There is always the excuse, "I was trying to help you." Well, if I couldn't open the door because of what I was carrying then I would ask for help.
Don't assume I need help because I have a handful. I'm used to a handful. I'm built for hard-labor. I guess others aren't. The ones that use the button must not be built for any labor.
We are in an energy crisis, people! If we don't start cutting our non-renewable energy expenditure, our reign on this earth will cease to exist.