The answer here is pretty obvious, but should I disavow spammy links even if the the homepage has a PageRank? A client of mine has tons of directory and social bookmarking links, but some of them have PageRank? Should I leave those or get rid of them? I mean they are clearly spammy for sure, bur almost 90% of the client's baclinks are comprised of these low quality links. I'm afraid of removing them completely. Thoughts?