Half-eaten Office Food, to Eat or Not to Eat?

We work in an awesome building, our office has snacks available most of the time. Sometimes it's quick snacks, sometimes it's donuts or cookies, sometimes it's food from one of our local restaurants.

There's always something to snack on so I don't understand why people eat half of something and leave it. I don't know if this happens in your office, but it happens in ours a lot.

Don't get me wrong, I understand why someone would cut in half on of those big gargantuan Cinnabons and take half. That I think is acceptable, however, opening a package of a single serving of something and eating half of it then leaving the rest, not so much.

I did a post not too long ago where someone opened a Nutty Bar and ate one of them, then ate half of the other (they come two to a package) and then wrapped it up and left it on the counter for someone else. The kicker, the Nutty Bar had teeth marks, not a break mark, teeth marks.

Well, I walked into the break room this morning to grab my coffee and found a package of crackers ripped open in the snack bowl missing 6 and leaving two. As if someone would eat the two remaining crackers. First of all, they were not wrapped up so they are obviously now stale, but why would anyone finish off two crackers not know whose hands had touched them. Plus, if you have already eaten six crackers, why leave the two, take them with you and eat them later. No one is going to eat them.

So do you have someone in your office that eats half of something and leaves it for someone else? I mean would you have eaten the remainder.