[raverbashing]

This is actually a good idea in some scenarios

For example, several sports have weight classes which are of course "abused" (as in, the athlete will do as much effort to fit onto a lower class - going through severe diets and dehydration)

Now if instead of weight you would measure "fat free mass" and maybe height, this would leave much less margin for maneuvers.

(Or, ok, you could re-weight the athlete just before the competition and disqualify them if there's a bigger difference from the weighting date - that would work as well)