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tedster - 11:10 am on Jun 19, 2008 (gmt 0)
There is one thing that protects a website against Google Bowling - a solid backlink profile of its own. The more your "real" quality backlinks grow, the less anyone else's malicious actions can affect it. [edited by: tedster at 6:12 pm (utc) on June 19, 2008]
Even if you block IP addresses or redirect pages, the links that point to your website are still there, and they're on other sites that you can't control. Those links will have whatever effect they have with Google's algo.