Is it possible that since the Google Farmer's Update, that people practicing Google Bowling can negatively affect your site?

[dahnyogaworks]

We have hundreds of random bad links that have been added to our sites across the board that nobody in our company paid for. Two of our domains have been penalized and three of our sites have pages that have been penalized.

Our sites are established with quality content. One was built in 2007, the other in 2008. We pay writers to contribute quality and unique content. We just can't figure out a) Why the sites were pulled out of Google indexing suddenly after operating well for years b) Where the spike in links came from.

Thanks

[DavidKauzlaric]

You can try reporting the bad links to Google. Communicate with them, it'll help. What kind of links are they where they'd cause a penalty? Generally, you can't penalize a site for links otherwise I could do that to a competitor...

Give me a few examples of the links?

[dahnyogaworks]

This post is deleted!

[dahnyogaworks]

In sifting through these two sites, I have also discovered one other thing. I checked their ISP neighborhoods and looked at shared domains to see how they were indexing. So far, almost all sites in the same neighborhood are not indexing. Could a bad ISP neighborhood by default bring your domain down?