I hate those people too, the same amount of pain should be inflicted on them too. Eye for an eye motherf*cker.
You blew off a cat's leg? Let's chop off yours too, and see how
funny that is...
Hunting - I'm against it, though not totally. If you eat what you kill, then it can be okay but only if you don't kill members of endangered species.
Medical research - until we come up with a better way to test stuff we can't do anything else. But I think there are more than enough desperate sick people who would be willing to undergo these tests. It would speed up the process and we wouldn't hurt innocent animals. But there's an other thing too. These animals are bred especially for research purposes, so I guess it's okay to experiment on them but the researchers should try to minimalize their suffering anyway. I mean, it's the same thing with those animals that are killed to feed us.
That's why I wish we had some of the technology from Star Trek, we could create food using only energy and do research using only advanced computer technology.