Of course you must not make exceptions for any family. My point is that there are a lot of families with which you are interfering; my family's situation was merely meant as one example.

Funny, I've never heard that the hose elves serving Hogwarts weren't up to the job of doing the cleaning. Nor have I ever noticed a problem with vermin at the school, and after all, I was there for seven years. Standards have slipped since you assumed the headship, have they? Odd, since we've managed to limp along just fine for close to a thousand years under the old system.

And I would think that it would mean less strain on the school budget if snacks are supplemented by outside sources.