Need some reliable input on how to remove those backlinks that are hurting my site(s). I have been to the three mentioned in the subject and have downloaded the csv files for each. Also trying to get a hands on how to read these, how to review the content snippets and see if they are the right caliber.

Can I remove the bad links myself or do I really have to contact the "Webmaster" and beg to have them remove these links. Have many more questions but don't want to put to much into one post.