“I may be the resident crank...”
You aren’t the only one. I remember my parents seeing stuff like this and saying that it was rather “sinful” to disregard food that way. I was raised that food shouldn’t be wasted (if there was leftovers and not enough for another meal... then the dogs ate it). The point is that it wasn’t wasted. Perhaps... it is how we were raised?!
I was raised the same way, but I think the idea of a food fight is nestled deep in our brains. We used to launch apple sauce from spoons in the school cafeteria and had a grand time doing it, too. It sure looks like juvenile fun, no one gets hurt, etc.