When did you verbally destroy someone you didn't know for their horrible behavior?

So I went to Subway yesterday to get one of those delicious $5 footlongs.

Upon arrival, I saw three girls, probably all about 17 or 18.

The first two order, and the server asks the last girl what toppings she wants.

She's on her phone, so she doesn't answer.

The server asks her again, not being

impatient or rude, just asks. And the girl snapped. Can't you see I'm on the phone here?

God, you're so rude. Just wait till I'm done. I was so offended and embarrassed for her server,

so I couldn't help but say something to her. That was extremely rude. You came here to get a

sub. Don't yell at her for providing the service you asked for.

Just get off your phone, order your toppings and stop acting like a child.

She looked at me with contempt and anger, but I think I intimidated her, so she didn't say anything back to me.

The server looked at me, smiled and mouthed at the words, thank you.

One of my customers where I used to work, this guy was being absurdly

rude to me and my co-worker. I'd already told him quite clearly that there was a line,

and he'd be waiting in it in the order he came in. This was a high-end store at Christmas time,

so the sense of entitlement is a little bit too common. He called my manager an idiot after

having to re-ring something, another customer behind him, and half his size, taps him on the shoulder and says loudly,

Would you mind shutting the frick up and letting these people do their jobs?

You're seriously teeing us all off.

The bigger guy threatens him, and the smaller guy goes,

If you were as tough as you like to think you are, you wouldn't have to be such a prick.

...