Diary of a Mad Editor lays out how the lack of blogging ethics can personally affect someone - namely her. The issue is the use of her Bitter Homeschoolers Wishlist on numerous blogs without proper credit.
This is basic stuff. If you reprint someone else's work (and no, not in entirety unless you have permission), you link to and credit them. Apparently it's hard for some to understand as you'll see when you read her post. She's asking for people to spread the word about her blog post. So if you've got a blog you know what to do...
I'll just say that the chap (revealed in the posts) who did her wrong may have done himself quite a bit of harm in the long run.
H/T to HE&OS