So I'm planning to do some large scale grey hat Trackback spamming. But first I need to know how the built in Trackback checker used in example wordpress works. This is how I will do it. I will link to different blogs in my niche which has Trackback activated. After I see my Trackback is approved and there is a link to my site I will remove the link from my website and hope that my link will stay listed. Will this automatic means that my Trackback link on the other blog disappears? How good is the built in Trackback checker, does my link to the blog only have to by live and active when the other blog admin approves it? Or does the Trackback checker checks if the link on my site is active more than once?