There are a number of reasons I say this, but here's the most recent:
I was updating our Christmas card label template (okay, that's reason number two I am going to Hell) and realized I was missing an address for two of my friends (married to each other).
My friends have unusual names, live in Seattle, and own a house. So I thought to myself, oh, I'll just get their address off the deed to their house at the King County Recorder's Office. Easier than the phone book, I think their number's unlisted.
It only took a second.
It didn't even occur to me until afterward how intrusive that was. That this didn't even occur to me as I was looking up their address is the number one reason I am going to Hell.