crobb305 - 7:34 pm on Apr 7, 2013 (gmt 0)
I started a thread a few weeks ago to ask about the disavow tool, but the gist of my posts in that thread was to explain that my site had received thousands of external hack links similar to those decribed in this thread. I currently have 8,000 links on my disavow list, mostly from .pl, .ru., and .edu. The strangest part is that some of those hacked pages were appearing for a while in the serps for a competitive financial niche. I haven't checked lately to see if they are still there (mainly above position 100).
The bottom line is, these hacks can rank, and the parasite links inserted may hurt the target if enough are accumulated. I can tell that the hacks in my case came from the same source/network/organization, because they all do a redirect to the same mortgage lead generation page. The fact that Google can't detect the redirect/cloaked content makes this situation even more frustrating.
My thread is here: [webmasterworld.com...]
I definitely hope the next Penguin update takes some of these hacks into consideration. My disavow list was sufficient to the the manual aspect of my penalty revoked; but, I have still seen no ranking improvement after 5 weeks. So much collateral damage is occurring from these large-volume hacks.