How do they get away with fighting dogs openly?
For one, I doubt they are doing anything openly as that would get an arrest team to kill all their dogs, destroy their home, and put them in prison on felony charges. The kids tend to be the ones getting caught and abusing at the most extreme levels. Next there is something called freedom of speech. How do you know they are not lying, how do you know he isn't telling a fictional story? They have movie producers that come up with far more gruesome stories and violent movie pictures and they are glorified for the work and creativity for it. For example, pulp fiction, true lies with Arnold Swartzanegger (if that's how you spell it), Terminator, Aliens, Behind enemy lines, and can go on and on. People will then say, well, it’s just a movie. Well some things aren't fake and are serious. For example the people that are in the aryan nation/aryan brotherhood/kkk sites that promote murder of humans that simply look or speak different than they or whatever stupid other reasons with no hard facts. They want to topple the government and take over the USA through domestic terrorism, which they would have to take on other countries like China, Russia, and Many Middle Eastern countries that would love to take the opportunity to take the territory and the rest of the survivors over. Then I think the militia guys would have to think twice as they would most likely be defeated horribly. These countries DON'T play. Even in their own societies. What do you think they would do to them? I know it sounds dumb to those who aren't involved with those organizations but many times they don't cover all the bases before doing something stupid. As they and the rest of everyone else that live here without hatred would suffer. Do you see all of them in jail or incarcerated? No, you can't arrest someone based off of accusations or because you don't like what they believe in. Here in the good ol' US of A, you need proof. So what you need to do, which I don't recommend, is to infiltrate the dog owners yard and become one of them and PROVE that they are doing what you think they are doing. Then, you will be arrested because you are not law enforcement. Just like a Good Samaritan who found cocaine on the side of the sidewalk and brings it to the cops to prevent a child from getting it. Well, they would arrest that person and charge them with possession and give them a felony. Only the "Cops" can do "sting" operations. That said, I am done on this question. The easiest way is if you don't want it, don't buy it and support them. Period.
How underground is the dog fighting world?
How underground? I would guess pretty deep, as there are many folks that own dogs here in the US. I guess it comes down to whom you know.