Heres a hack for you. I'm currently having an issue of a mugshot extortionist stalking me in angst of me thrashing his ability to monetize in several areas. Infuriated at his false mass flagging on my youtube channels, and erroneous reports on many social platforms i decided to look up his backlinks. Sure enough it showed he had backlinked google. Not the sites domain with juice being fed, he used a sql query string and when I popped in my domain it brought up this page and it's a do follow... If his url is input completing the string it was apparently acting as a regular 301 and he was getting the juice off it. sweatbag. But yes they get hacked all the time