Comment 0 for bug 314408

The main reason why Debian/Ubuntu does not enable automatic printer detection
in cups by default is that there is no way to tell apart locally configured
(and thus trusted) printers from those which got detected automatically (and
thus open the possibility of luring someone into printing confidential material
onto a rogue network printer).

E. g. I have a locally configured "local_ps" printer, and an ML-1610 which
comes through cups browsing detection. The print dialog currently looks like
this:

  http://people.ubuntu.com/~pitti/screenshots/print_dialog_gtk.png

the printers look exactly the same, I have no way to tell which ones can be
considered trusted. It would be great to separate the locally configured from
the remotely detected ones:

  |_| Print to file |
  |=| HP DeskJet 123 | room 10 |
  |=| Samsung Foo Color | |
  Automatically detected remote printers:
  |=| ML-1610 | dagobert |

They can be told apart with the CUPS_PRINTER_DISCOVERED flag (see cups/cups.h).