You built a website for your parents that relates to the filed of real estate. You've completed link building for them via forums, blogs ad human edited directories that real to real estate. That all being said, another realtor out of another state has asked to complete link building for their real estate website. You will need to post on the same forums and blogs as you have done so for your parents real estate website. Will Google, MSN and Yahoo trace the IP's and ban my parents site or penalize them? I would have to create other user names and signature links on these same forums and blogs. How does this all work? Would or should I change IP's? If yes, how so? Yes, all content relates to the blogs and forums!