While I don't personally care, some would say it's unfair for those staying at BCV to be able to PH while those staying elsewhere can't. You can come to my pool but I can't go to yours.
It doesn't matter where you own, only where you are staying. If you are staying on points at a DVC villa at WDW, you can pool hop to any Disney owned pool at WDW except any BC/YC/BCV pools or AKL/AKV pool. As long as pool hopping is not blacked out for a holiday time.