Google recognizes the Web's power to publicize and offers Web masters a simple interface to remove their own pages from its index. (Type "remove" into Google to get started.) Other preventive measures include putting sensitive info behind password-protected walls and attaching so-called robot files to Web sites that tell search engines not to index a particular page or site.

FORBES: Google Me Not

This is because the Google index assumes that a link is indicating that the page is useful and or important and thus makes it important inside the index.

FORBES: Google Should Ban Google Chrome from the Google Index

Google has paid bloggers who have linked without using nofollow thus skewing the index results thus Google should apply the normal penalty, removal (or at least downgrading) of the Google Chrome page within the Google index.

FORBES: Google Should Ban Google Chrome from the Google Index