I agree with you completely Apples and Bananas. Its so disrespectful and all about THEM. I will on the RARE occasion if a parent asks me for whatever special reason that day for an earlier time but will emphasize I can't do that on a regular basis as my own family comes first.
People have no idea or just don't care that we have our own families to get up and ready, not to mention ourselves. There is also the food prep and playpens to set up.
Stick to your guns! Don't answer the door! We thankfully don't have a doorbell or a dog so they can stand in my mudroom or sit on my front bench and wait.