Pondering fast food and how it is eaten. Let's see, there are sandwiches (burgers in buns, pizza, good old British sandwiches, toast, etc). This type of food has always been finger food. What else? Fish and chips. Haven't had them for a while because they don't taste the same now that they're cooked in vegetable oils. I thought it was traditional to eat these from the newspaper with your fingers. We always did.
Then there's food like cold quiche — finger food.
Fruit — often finger food, but it can be spoon food in a fruit salad.
Buffet food, designed to be eaten with fingers.
Party food, ditto.
I'm running out of ideas.
So ... um ... I don't quite see how fast food, or finger food generally, can be blamed for bad table manners. Also, I don't think it's right to criticise other cultural practices which are essentially harmless, such as eating rice with fingers or cutting up all your food first and then using a fork. The fact that it isn't what one's used to doesn't make it wrong or bad-mannered. I think it's bad-mannered to whinge about it.