Can't the same thing be said about people who get entertained by two people beating the crap out of each other in a small roped off square?
About Vick, here is the problem, his profession is one that uses his animal instincts to perform - Football is a sport where brute force coupled with hard physical contact and in some cases no brains are really needed. To expect him to be 'rehabilitated' in any way shape or form is about the same as expecting Charles Manson to become a passive person who play Santa for the children at orphanages.
If Dog fighting is an issue for some, then it is justified. I would think it is not all because of the dog fighting itself, but what is forgotten in a lot of these conversations - the collateral damage. In this city, which has a lot of dog fighting, they take animals and use them as fodder to train the dogs as many know about. Sometimes these are pets they take out of people's back yards or cars and other times they get them from Puppy mills - this was where my beagle came from, he was to be used to teach the dog how to love blood. Cats are another thing that are used and I can describe some of the things that are done to them if anyone wants to really know. This is the real problem, not the fighting or killing of the fighting dogs.
The other issue are with the dogs themselves with the idea that they are safe (another sometimes Manson rehabilitation case), Pitbulls from a legit breeder who doesn't inbreed the dog may make a great pets (sister had one) but those who are products of inbreeding, well lets just say three shotgun blasts and four 9mm don't always stop them.