shelley
chang
all you would have to do to prevent cheating with the scrambling table is check to make sure the scramble is good before calling the competitor's name.
If a competitor came up with a scrambled cube and put it under instead of on top of his scorecard and nobody caught it, this wouldn't really help.
On a separate note, let all your judges know: scrambled cubes go under scorecards. Solved cubes go on top of scorecards. Very simple system which some people unfortunately haven't caught on to.