Exactly. The lines are so blurry so I truly believe that people do not even understand what they are doing is wrong.
Even you, a highly intelligent English-is-my-first-language and I understand what plagiarism is person (yes, I am giving you compliments!) did it without actually intending to. So the chances are high of something doing it if they aren't educated about it and might not understand the concept of plagiarism.
Thanks for sharing!!