Why would a stop for a one be any easier to mark, the contention here is did they stop or not isnt it? Tough for an observer to get it right every time, even if stopping is allowed its still quite often hard to really know if the rider went backwards or not at times. Even the paid professionals in other sports get it wrong at times. Looking at the videos, to me only Dan Thorpe really rode it non-stop, but if I was the observer I would have probably given them all the benefit of the doubt, thankfully I'm usually a rider. Personally I prefer non-stop rules partly because it suits my riding style but also means the riders get through the sections quicker. Its tough to cop what we might think is a wrong score but its much tougher being the observer.