  Morozov (2011) also describes some concerns for democracy vis-à-vis contemporary search engines by calling attention to the filtering of information that search engines make possible. For one thing, he agrees with Sunstein (2001) who worries that the kind of selectivity made possible by Internet filtering can easily trap us inside our “information cocoons.” And Lessig (2000) suggests that any kind of filtering on the Internet is equivalent to censorship because it blocks out some forms of expression. Morozov points out that whereas Sunstein worries that people could use Internet technology to “overly customize what they read,” the reality is that contemporary search engine companies have already silently done this for them. Morozov’s concerns about what search engine companies are now doing through filtering and customization schemes, and why this is problematic for a democracy, are echoed by Pariser (2011, 13) who points out that “personalization filters serve up a kind of invisible autopropaganda, indoctrinating us with our own ideas, amplifying our desire for things that are familiar and leaving us oblivious to the dangers lurking in the dark territory of the unknown”.