Since you're an actual person reading this, your blog is probably not a spam blog. Automated spam detection is inherently fuzzy, and we sincerely apologize for this false positive.
Before we can turn off mandatory word verification on your posts we'll need to have a human review your blog and verify that it is not a spam blog...
Curse those spammers, for their cheap tricks I now will have to type in an additional yehou for this post to get published. Probably all those hyperlinks and the repetitive texts in my pet project - Vintage Indian Advertisements are responsible. But can't possibly avoid doing that. Will have to live with additional keyboard tapping for some more time. Not much of a problem there and many many degrees lesser than those irritating spam blogs.
Read about Blogger's spam fighting techniques.