With those caveats out of the way; when I did have to deal with abusive feedback, I focused on two things:
1) I could easily separate my real life person from the "Fuzzy" persona I cultivated on the internet.
2) If our little game had prompted someone to get so worked up that they were going to rape and kill my kittens because we were making changes to a weapon, then we'd done something right.
I'd been a hardcore, vocal gamer before I had to deal with hardcore vocal gamers. I wasn't abusive, but I had felt that passion from both sides. I didn't like, tolerate or condone people who were abusive, but I tried to understand where the passion was coming from.