Spam Blog comments

So I've been getting quite a few spam blog comments. If you want to promote your own blog/website and get a backlink it's fine as long as you post comments that actually show you've read my post and are contributing to the discussion. Please do not just post a generic response with a link to your site, it will get rejected. And if your website is a related to palladium engagement rings, and/or jewelery, it still means you've got to comment on something intelligent and meaningful. Rant over, it just really pisses me off when people don't even bother to add even something semi-worth reading.