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I have a big concern with my website. Recently I have been combing through the back links that I have been able to find associated with my web domain. Almost half of the links- 52 links- are from kinder-host. They are from what looks like could be valid sources, like babies-r-is.com/kinder-host.com or babies.kinder-host.com/page/6 etc. but they are junk. Some of these links are from articles I've written that are ripped off and placed on these websites along with my links. Some of the sites I can't even find the link but its there somewhere. Another 40 of the links are from attracta.com and although I can tell I have links on there to my website as well, I don't even see the link on the page and it is not related to my website. It's another junk site. So, I have bad link backs and no control over it. My understanding is this is potentially very harmful to my website! What can I do about it?