I'm still a "pre-bandseter" myself, but I have to agree, stop and think about where you have already been and how you got to the surgeons office to begin with.
If you just gained some weight and are looking for an easy way to lose it then yeah I would think twice.....but if you have been fighting with your body for years and came to this discission then maybe this is just a case of cold feet.
If you are having success with the pre-op diet then just think how much futher along the band is going to help you to get.
Good Luck!!
~M