People who take 1/2 a donut/pastry. Even if you didn't actually touch it with your fingers, we don't know that & automatically assume that you did; NOBODY wants your tainted 1/2 pastry. You just ruined an entire donut by taking 1/2, so just man-up & take the whole thing. You don't want to eat it all? fine; save it for later or throw it away, either way, nobody else is going to eat it, so you've just wasted 1/2 a donut regardless. Don't try to fool yourself that you're not wasting food, you ARE wasting it if you don't eat the other 1/2. You're not a pig for eating 1 donut; you're a pig for eating 1 dozen donuts, though that would be impressive. Oh, you're counting calories? Then don't eat the flippin' donuts! And BTW, if you take the last donut, THROW THE BOX AWAY! Don't leave it there for someone else to deal with, it takes you about 3 seconds to toss the box in the trashcan; it's like if you use the last paper on the roll of toilet paper, you put a new roll on the spindle. Of course, that is a whole 'nother rant.
Regards, GF.