Purge all the comments
Recently, I cleaned all of the comments, too many comments are just spamming without giving the slightest value to the post. Comments should provide additional information or at least add a value to an existing post, and put a link only to support or to add further discussion possibility related to the topic.
Indeed, a lot of valuable comments but I do not want to spend my time just to re-examine previous comments. From now on I use Disqus for blog commenting system.
If you want some kind of signature to promote your blog, then this blog is not the right place, you can try to register on my forum that provides this feature.