Well, you've probably figured it out from the title, but it's because I've been involved in a case regarding a photo I used on my blog. Like most of you, I'm a casual blogger and learned my way into blogging by watching others. And one of the things I learned early on was that a post with a photo always looked nicer than one with just text. So I looked at what other people were doing for pictures. And mostly it seemed that everyone was grabbing pics from Google Images and pasting them on their sites. Sometimes with attribution, most of the time without. And when I asked others (or looked at disclaimers on websites and Tumblrs), it seemed that everyone agreed using pics that way was okay under Fair Use standards.
Photo by Paul Reynolds (cc) (pulled from the source)