In a move that is not yet widely announced even internally, we have heard that Walt Disney World will soon move to lock down access to the pools at their resort hotels, so that "off hours" swimming will become a thing of the past. Reportedly by some point in November, all Disney pools plan to be locked and inaccessible even to hotel guests in the overnight hours.
At present, some resort pools have no fences. Many of them are open odd hours (such as 11am or 10am variously) and close late, but guests can still venture into the pools even overnight, so long as they recognize there is no lifeguard on duty.
But once the change is made, all pools will be off-limits if there is no lifeguard on duty; the pools will be fenced off and keycards/bracelets will not work to open them during the overnight hours. Apparently they plan to fence in remaining pools (though I didn't hear when that would happen. By November? Some months later?)
Under the new policy, all resort pools will be closed from 11pm until 7am. Lifeguard services will start earlier than they do now, but it's not sure if they will start as early as 7am.
This is breaking information not yet announced by Disney (technically that makes it a "rumor"), and it's unclear if the lifeguards themselves have been told yet. We will update this post if more information becomes available.
EDIT 9/26 - Disney has now confirmed to the Orlando Sentinel that the plans are indeed real to lock pools overnight. One detail that wasn't in my original report: some of the smaller side pools may remain open and unfenced.
Kevin Yee is the author of numerous independent Disney books, including the popular Walt Disney World Earbook series and Walt Disney World Hidden History.