Actually, too many times. But I learned the lesson:

Why does that have to be my problem? Some poor-mannered person ruining my day (too many times)?
Because I let them.

I try to not expect anything anymore. If someone is not even worthy to affect my mood, why should I let theim ruin my day?

Every day is much too valuable for me to let some unknown individual ruin.

I still get surprised occasionally, and more often pleasantly. ;)

We need to help others stop the ‘bad mood pandemic,’ not fuel it. Good mood is contagious, too. And it helps me ‘open so many doors.’