I can see it now- this idea becomes into fruition and the amount of chaos it'd cause. Regardless of who's slacking off or not, some people aren't too fond of trying to make numbers skyrocket. People have other things to do other than grind for gear and other resources to be number 1 in the numbers. And so what? This gets enabled and now everyone and their mother thinks they're Gods among men and become A-holes. It's nice if it's personal but as a full implement, I can see how much chaos it'd cause. I do understand though; it could be used in genuine teaching, but you got to consider that a majority of the players on here wouldn't think of it in the same light as you and would misuse it.

tl;dr Nice idea for personal use, not as a default dungeon use.