I'll have to see it to believe it. I highly doubt they just aren't loading the back rows anymore because of a couple people not using their brain, or not supervising their children. I'll be there in about a week and a half so I'll have to see.
But if they really aren't loading the back rows, then might as well not load the front rows either. I could easily lean forward and put my hand in front of the boat. So then why not just make glass walls around the whole boat lol. For the millions of people that visit Disney and the handful that injury themselves by being careless, I don't see it creating such an issue to where they don't load a row.
Someone could easily jump in the water..So for taking precautions, why even have the ride open anymore lol. Could also jump out of the truck on the Safari at AK. Might as well put in further precautions. Joking aside, I'd be highly disappointed if they made any loading changes just due to a couple poor choices. If ANYTHING, renovate the ride where the boats don't collide with one another. Dont force wait times to grow longer by not loading a row.