Then that person probably shouldn't be eating out.
One of my top pet peeves is behind someone in a line at a restaurant, drive thru....whatever it is....and they stare at a menu like they've never looked at one before.
I mean...for McDonald's it's especially stupid, because we've all been there a million times. Everyone knows what's on the menu. When someone says "May I take your order please?" it should take a few seconds and that's it.
The worst are the group of ladies one gets behind in the ordering line at a Zupa's...etc.