Not really when you can cut 20-30 lbs. What's the point of having a weight class?
If a fighter's walk around weight is within 10 lbs of the weight he's going to cut to then what he puts back on should be easily regulated.
If someone can do it safely then it is part of the game, like it or not. I don't believe long term it is healthy to cut certain amounts of weight in that short of an amount of time...
-first problem is figuring out how much weight is unhealthy for a particular individual, IT VARIES GREATLY and one rule cannot describe it
-second problem (I have personally) is who gives a rip if they want to be unhealthy, these are the same people who are on steroids etc. (would do anything to win and to make $$) do they really need babysitters?
-third is people always point out the times when cutting weight helps a fighter, but not the ones where it hurt their performance (there are MANY examples)