I'm a caveman that still uses Blogger's "Follow" feature. I'm getting a craplot of stuff from writers-images.blogspot.com appeaing in the right-hand pane of the "blogs I'm following"even though I've never followed them. It appears to be random junk, much if it a couple years old and in sketchy English. No such blog appears in the left-hand pane so I can't unfollow them.
So they've either:
1. figured out how to insert their feed into my list;
2. Hijacked and renamed one of the legitimate blogs I follow;
3. Google/Blogger is just all temporarily confunkulated.
I haven't heard of #1 being an issue but it wouldn't surprise me if somebody figured out how to do it. Both #2 and #3 seem pretty believable to me, because the blogger help forums are all lit up with complaints right now about blogjacking and being mislabeled as a spamblog and shut down.
Anyway, if you're a Blogger user I'd recommend you do a backup. Export a copy of your blog and save a copy of your template. Then eat a marachino cherry while dancing the macarena counterclockwise, just to make sure.