My second-favorite self-checkout peeve is when I go to Target (+grocery) and want to buy two or three things for lunch, one of which is an apple--a Fuji apple,

My second-favorite self-checkout peeve is when I go to Target (+grocery) and want to buy two or three things for lunch, one of which is an apple--a Fuji apple, which I have memorized as produce #4131. The apple has to be weighed, so it goes on the scale. But the scanning lasers also go across the scale plate. If the scanning laser manages to read the little bar code on the produce sticker before I manually type in the number on it, the whole self-checkout station immediately panics and calls for a store employee to unlock it. Every. Time. This problem has existed for years. I now trigger it on purpose whenever I'm not in a rush. There's no excuse whatsoever for a self-checkout system to grind to a halt when reading a bar code that legitimately appears somewhere in the store.