I would wage if you live in an old, old house there's a good chance someone died in it. I had a home built in the 1800s, I don't worry about it, and I don't worry if own a gun that took a life. I'm sure some of the guns I have from military use have killed people, but that's history, good or bad it's history.
Talking about body count sounds like a gamer talking to his buddies.