Well if they have a mega-fight and 2 days before weigh-in they announce the fight is off due to some banned substances, then alot of people would be ticked off for sure. Boxing walks a thin line anyways in the bigger picture of sports; imagine what a couple of cancelled fights would do to even the die hard fans of the sport. Lots of money to be made for the hotels, vendors, etc. etc.. Imagine all the fans who travelled over from U.K. to see Hatton/Castillo. What if it was called off because one of them had been doping up?? All the people making money off them wouldn't be able to count on that $ again. I think the fighters should be tested before the fight though, as a couple of screw-ups like that and the hammer would come down hard on all involved and things would get put straight. Sorry if I rambled, I just woke up and my heads fuzzy,lol.