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I remembered Google had an option to block certain domains from your search results, but that feature was removed last year:

And if google uses pagerank, and there is no content to link to, how do they rise so highly?

they certainly open up to googlebots. Human generated content opened to bots but not to humans. bad SciFi...

The claim they don't open up to googlebots, otherwise they'd be on the wrongs side of the TOS and get banned.