Yes, that hamburger question really got to me too. If it is not my underage child, or maybe, just maybe, my husband of over 20 years, it is not my business what others eat. And even then, in the question it seemed like a 'special occasion' so healthy eating rules would not really be that appropriate.
My personal least favourite was the question about messy guests. First, I would not like anyone but family members cleaning in my house. Too intimate to my taste. So i tried to answer to question from the point of view that I would like them to offer to help, but they do not. And still, if I invite guests, I both prepare to the visit and clean up after it. If I don't want to do that, I will invite the guests to restaurant or café or other similar place instead of my home. I couldn't find it in me to ask my guests to either cook nor clean for themselves. And my grandmother would certainly whirl like a windmill in her grave if she heard the idea (and she is the one who taught me some manners.) And can you imagine how restless and uncomfortable that would be for everyone else buried to that graveyard?
Only exception would be longer term quests who are treated like family members during their stay.
