People are stupid.
We had an In and Out in Vegas one time. As we were waiting in the drive through line, we watched a rat as big as a cat wander into the storage building they had. The burger was a definite letdown.
Personally, I prefer 5 Guys. In-N-Out burgers are okay, but nothing to write home about. Their fries are inferior to 5Guys, plus 5Guys practically buries you in the damn things.