What are your feelings about not keeping your hands, arms, feet, and legs inside the ride vehicle at all times?
Point being it's a rule. While not necessarily in place for your safety, it is there to keep the ride experience as high as possible for all guests. Disney works extremely hard to create a theme, story, and effects best enjoyed within the elements constructed. I know it can be tempting when you are the only rider in a POTC boat, but that should be the time you concentrate most on enjoying the ride with out interruption, finding things you never noticed before, appreciating all the details that make it so great, and less about trying to get a photo. Trust me, I am a picture fiend but sometimes the best memories are made when you put down the camera for awhile.