Write a module that does this. See how much you like it. I'm not saying it's a bad idea, and I'd love to have a module that would allow me to choose where I even want restrictions to be usable. (In other words, I'm not willing to jump in two feet first off the high diving board ... yet.) The idea of cleaning does make the whole concept more palatable. But, I think you're not going to be as thrilled with it in practice as you are in theory. (It's ok - most good theories are like that. It's just that not all good theories are practical.)