It’s very common for spammers to create blogs on Blogger (something.blogspot.com). There’s a survey out there that found that 74% of blogs on the site were spam.
It turns out that you can report spam blogs pretty easily on Blogger: they’ve got a form for it here. You won’t find it linked to on their site (or at least, I didn’t), but it’s available. Use it and make the Internet a better place!