Since when was breaking up a double play not part of the amateur game? I think as long as the runner is able to touch the base, stays low, and doesn't make excessive contact beyond the base, there should be no issue/need for this over-the-top rule as it is now. Anything beyond those criteria should be a judgement call by the umpire. I realize it's not cut and dry, but much like the NFL catch rule, people (for the most part) know what is and what isn't a clean slide. We don't need over-regulation to muddy up the game.