Unsolicited comments

Folks, I may just close down the "comments" option. If people were really commenting on my blogs, I'd love it. But no. Almost all of them are thinly disguised ads like this, just in: "Very unique blog you have! I'm definitely going to bookmark you! I have a free knitting patterns site [or some other unrelated product or blog]. It pretty much covers free knitting patterns related stuff. Please visit it. [signed] Rod." They even put these same phrases (in English) here, on my Spanish-language blog.