I think the OP's idea was an adult section of SSR only. Obviously blocking off an adult section for other smaller resorts would be a nightmare, but SSR? From what I've gathered is it is huge and undersubscribed. So would making an adult only section of SSR (and SSR only) be such a trouble? I think at SSR it could work, no problem.
Personally, while I would like to be away from kids, I would select an area based on distance to amenities and view before choosing based on the number of kids in the area.