Here's an interesting question that I've never seen addressed by any of the myriad folks that want BSA to change their policy. How would you handle camping?
Currently, camps are required to maintain separate men's and women's bathrooms, or have signage that can be prominently displayed so that members of the opposite sex do not have to worry about running into each other there. They are also required to have separate bathing facilities for men and women. So, do you now make three signs? Do you mark off a separate time for gays to use the shower facilities, or do you force every camp to build another set of showers?
Just some things that flitted through my head.
Gays go to public school and shower in the locker rooms there. They serve in the military--including in the field. This just isn't an issue.