Just came across not one, but fucking 45 301 redirects pointing at one of my clients sites that we have NOTHING to do with. The rankings have already started slipping, and there's absolutely nothing I can do except keep building links in hopes to stop the bad effect. This is certainly more frustrating than standard negative SEO, because at least you could disavow links. Can you even disavow a 301? The SERPs are so easy to manipulate (in a bad way). This shit is getting out of control.