I once held a heavy office building door open for a pregnant woman, a stranger, in New York and she barked at me, “It’s not a disease you know!” very pissed off that I had made ANY allowance for her condition.
Basically you can’t win, because you never know who you’re dealing with. Do unto others, and then get kicked in the nuts for it.
My standard response:
“I’m a gentlemen, even if you’re not a lady.”
And for those who don’t acknowledge my holding the door:
“You’re welcome”
I would have retorted that bitchiness most certainly is contagious, and then let the door close before she could walk in.