than absent mindedly neglecting to say thank you?
I like to think my manners are fairly acceptable, I try to see polite and put people at ease. However, today I was the recipient of the PA "you're welcome" when I neglected to acknowledge someone who held the door for me. As it happened, I was distracted, I'd just heard that DH's illness is terminal and was wondering how on earth I was going to tell DC.
Of course I should have said thank you, but what was muttering "you're welcome" at me supposed to achieve?
Yes, it would be good if everyone always remembered their thank yous, but I'm prepared to bet that the majority who have a momentary lapse and don't meet your standards are equally distracted, even if it's "only" about what to get for tea after a long day.
Going out of your way to deliberately make someone feel bad is surely far ruder?
If you must, feel smug inside about your superior manners, but don't kid yourself you're the better person if you deliberately act to show someone up.