I am working with a site which we'll call www.newdomain.com, which was hit by Penguin this month despite no unusual practices. I found lots of really spammy links to their old site, www.olddomain.com, which 301s to the new domain. So I've gone through the process of identifying which links are really bad, made contact to ask for removal, and am at the stage of disavowing links. But wait! None of the bad links point to newdomain.com, and I worry that a disavow request via this domain in Webmaster Tools will damage something. Do the old band links affect the new site? If so, where do I disavow those old bad links? On Webmaster Tools for the new domain?