HAL (or perhaps the individual ships) would do well to address this issue - an aging population (and HAL draws them), a wider acceptance of people with disabilities getting "out there", a limited number of accessible cabins - all create an increasing issue. Blocking the hallways, even temporarily, with scooters, wheel chairs, etc., (and food trays and strollers, too), create a safety issue, not only for able bodied people but for others needing to move down the hallways using mobility devices (including walkers, rollaters, canes and crutches). On my last cruise there was a disabled vets group, and many scooters and wheel chairs - some were parked near the elevators but my understanding is that that's not allowed or safe. I hope it doesn't take a lawsuit (injury or even death from a fall) to get their attention (I'm sure they've received comments/complaints about obstructed hallways).