My doc wouldn't allow it. You had to maintain a steady loss leading up to surgery. If he saw you gaining at the end, which meant binge eating, he would cancel the surgery. I think most everyone goes through this to an extent. The problem is food is just like a drug. Eat something terrible, but then feel that wasn't the right "fix" you were looking for and move onto eating something equally as bad. For me I wish to hell I would have had a last meal at Buffalo Wild Wings and gotten my wing fix taken care of. Problem is I would have gotten that fix and I would just be craving something else.
Personally I don't think there's anything wrong with having a few cheat meals here and there as long as it doesn't lead to weight gain. I had a good send off weekend prior to my 2 week pre-op diet but it wasn't anything insane. I was really careful in what I ate a few days before and after to offset any potential gain.
I suppose you need to look at it as getting things under control at some point. We're all different and everyone handles addictions differently. The 2 week diet is not a walk in the park so bear in mind that the more you binge the tougher those two weeks are going to be.