Oddly enough, in the previous incarnation of this topic I posted a link to an essay, which contained towards the end criticism of Google. Within about a day, and probably because of its link to this page, it was highly ranked under "Behavioral Property" and several other searches.

Now I note that the search [zork.net google] pulls the page up, but searches like ["Behavioral Property" monetization"] or even ["Behavioral property" "Intellectual Property"], that is, the main topics of the essay, don't any more. In other words, you can find the page, but not via its content. It is as though the content has been "unindexed" without deleting the page per say, as it can still be retrieved by fractions of the URL.

Does Google actively screen for pages critical of it and filter them?