Not to worry, Ree. Vito would not have felt obligated to smile back. If he was sitting in a Taco Bell, he'd be too busy to even notice you -- he'd be looking through the items on his tray, muttering things like: "What the hell is a gordita, anyway?" and "Can you believe they want $3.99 for this little nothing?"
But the truly amazing thing is this: just how much stuff would be on that tray of his. That little nothing that cost $3.99? There'd be 20 of them. Gorditas? Dozens. And while he might not be smiling at you, he would certainly be asking you why you weren't eating more of them.
"C'mon, have a few of these. I got 'em in case you got hungry. Here: I got you a chalupa... Whatever the fuck that is."