Dark side of the blog

Obviously I am a novice at this blogging world but plagiarism of one blog to another seems creepy and insidious. I found out about this issue reading Blast Radius (from Aussie Blogs). One American woman seems to have been targeted twice. I think I should stick to publishing bad photos and inconsequential mutterings to avoid these weirdos. What do they think it will do for them? Do people use their blogs as some kind of life/career enhancement tool?