OK I'll bite: Why cant people seem to understand a simple stop watch (count down timer) is a solution to the "idiot bouncing in place for 5 minutes" type comments. In fact its so simple - its already employed at the world level and nationals.
Also - "The other than the fact that its difficult to judge" is not a point that is just glossed over with supporters of stop allowed. For the most part - that's the main argument.
Hey - if you dont want to stop - dont! Show us all that dynamic motion!