But in this case users aren't aware it's the internet. They think they are doing a local filesystem search.
True, the first time they see an Amazon result they may do a wtf, learn about this misfeature, and perhaps turn it off.
OT - I just stripped off all the bloat from my two ubuntu computers - gnome, unity, kde, xfce. Only gtk and some very basic gnome libraries remain, with software like libreoffice, evince, inkscape, gimp, and of course latex/emacs/compilers etc remain. I'm using the i3 window manager. It feels so much faster and I'm so much happier.