People that don't hold the door irritate me.
People that walk through the door that I AM HOLDING FOR THEM with no acknowledgment....just flat out piss me off!
I am very good about always telling someone thank you for holding the door for me, and if it's a man that does it, I will frequently say . 'thank you, you are so kind to hold the door for me.' and smile at them. It takes all of two seconds to do so!!
When I hold the door, and there is no response?
I usually will say.....YOU ARE SOOOO WELCOME!! In the same tone a proper Southern woman would say "Bless your heart" when they really mean "F-K you!"
It goes right over a kids' head unless their mother hears it, but I'm pretty good at making sure a man will hear it when I say it.
When they turn around and look at me like how could I possibly be so rude.... I just smile and bat my eyelashes.
And think..."F-K you". 
If someone does that (holds the door open for me), I say, "Thank you very kindly." I had one man, who held a door for me and I said that to, in the Mobil/Dunkin' near me, ask me, "Sir, are you from the South?" I said, "No, sir, but Southern courtesy is
sorely lacking these days. I want to bring it back, one person at a time." He asked to shake my hand at that point (which didn't have a coffee cup in it yet). I gladly took his hand.
As for those degenerates who don't say anything, I go my own way, because it's not worth my time or effort. One time, I had a feminazi say something to me, so I loudly replied, "Excuse me. I thought you were a lady,
worthy of my respect. I won't make
that mistake ever again." Said feminazi was blindsided by my response and sulked away.
