Don't you think that most people do that, even if it's not that extreme?  Think about it, I know a lot of people who will go out and have a big meal or something and say, "I'll just make up for it tomorro."  Or if people know they're going to eat "a lot" later, they fast for a few days before?  (Not that that's helpful).  I do it too, but not to the extent that you're talking about here.  I guess it might be kind of different though, since I have an ED anyway and I tend to not eat enough as it is.