I had a website having about over 40 keywords ranked on the 1st page with desirable traffic, but what traffic is that my site was hacked. Someone actually upload some .tarz files on the root of my host server, I contact my webhost Bluehost asking for how the heck, they actually pushes the blame to "3rd party script supplier", they didn't really give you a solution at all.
My ranking gone from avg #3 to #0 In mere 12 hours after my site was hacked and for now(few days later), it has been subject to deindexed. Site are copyscape passed content with only 33 backlinks in 2 months, not a MNF. It's an informative website, really forget about what Google said, they won't keep their promise such as Content is King or whatsoever.