Hi, I use WordPress for my website [http://essayservices.org/] and I've found a plugin which hides my back-links from back-link crawlers such as majestic seo and Open site explorer. However, I found a lot of information about this in black hat seo websites. Now my question is that; is it good to have something like this one to be enabled on my site? Could it harm or improve my seo results? Thanks.