I've heard that larger kitchens like in Westwood and Benefactors suffer from the case of the stolen food more often than the smaller kitchens, perhaps because there are more people in the kitchen and that there is an idea that there are so many people that you won't be able to pinpoint the person out. Then again, there are the benefits of having a larger social group to start with (which is beneficial for Westwood).
Again, I'm not sure about how the kitchens are exactly laid out/fridge numbers.