The Electronic Frontier Foundation expresses
privacy concerns with the new internet search added to Ubuntu 12.10.
"It's a major privacy problem if you can't find things on your own
computer without broadcasting what you're looking for to the world. You
could be searching for the latest version of your résumé at work because
you're considering leaving your job; you could be searching for a domestic
abuse hotline PDF you downloaded, or legal documents about filing for
divorce; maybe you're looking for documents with file names that will gave
away trade secrets or activism plans; or you could be searching for a file
in your own local porn collection. There are many reasons why you wouldn't
want any of these search queries to leave your computer." The
article also includes instructions to opt-out.