Dream, In the 90's, in a Sydney high-school, i held a door into a history staff room for a young English teacher
and was abused for it. Not only not thanked, but roundly abused. "You should not have done that", she said angrily.
All my life i have also been, with others here who have said it, an open the door for everyone guy.
Heh, also only last week a woman walked through a door held open for her without a word. I said to her back, "You're welcome." So am with you guys there too.
It's simply consideration. Doesn't have to be, and shouldn't be, anything more.