It must sound a bit sarcastic but why should betting places not start to make "fighter x will (not) make weight for his fight" bets available? Though, I think that the big 4 abc's should go back to/start same day weigh-in and impose penalties (like temporary bans) on athletes who can't make weigh then...
Damn good question. Might be too easy to fix though. Dude could let it slip out that he was eating an extra sandwich and people would make a killing.