Good service? What's that?

Weird thing at a McDonalds last night:
I was driving home from Jackson, and I was really thirsty, so I stopped by a McDonalds for a Coke. But when I got to the drive-thru thingy with the computer screen where you place your order, I saw that it had been smashed up. The computer screen (and presumably the audio, too) was completely crushed as if someone had taken a sledgehammer to it.
Taking this as a hint that the thing probably did not work, I pulled ahead to the first window.
Nobody there.
So I pulled ahead to the last window, thinking certainly somebody's gotta show up there eventually.
After maybe two minutes, this chick comes up, opens the window, and looks at me like I just landed from Mars. Her expression seemed to say "Who the hell are YOU?"
I politely explained that I'd like a large Coke, please.
She said I needed to go back and place my order the right way.
I told her how the thingy was broken, and there was no one at the other window. She was the first human being I'd actually seen working there. (Using the term "working" very loosely, of course).
She didn't seem to care. She repeated that I needed to drive back around and do the whole thing all over again. (Um, hello, just tried that, didn't work...)
(Would it have KILLED her to just take my money and pour me a drink? I mean, the cups and drink machine were right behind her the whole time.)
So I gave up and realized there was no chance of actually getting service here.
Since this is America and we have McDonalds on just about every street corner, I drove to the next one and got my Coke there.
It was late at night and McD's was the only place still open. Otherwise I would have made sure to spend my money elsewhere, just for the principle of the thing.