Google Said You Can Ignore Spammy Links Even When The Whole Penalized Site Is Redirected To Yours

Google's advice since Penguin 4.0 was that you don't need to disavow links since the links are neutralized and don't end up helping or hurting you. In short, Google ignores those links. This even applies to when someone redirects a site that was penalized for spammy links to your site, said John Mueller of Google.