There is only one way to truly get back at an office lunch thief: the answer is in the food. We have dealt with several cases of office thieves here at FAIL Blog, but the most egregious example is always the lunch thief. Getting that break in the middle of the work day to eat that sad excuse of leftover food is sometimes the only thing people hope for during an eight-hour day. Choosing to mess with someone's hopes and dreams like that just because you can't get your own act together and make yo…