Print subsystem unusable on large network

Automagically gathering all available zeroconf/avahi/whatever-its-called-this-week printers and presenting them as configured printers renders the print subsystem almost entirely unusable on a large network (>30k hosts on a LAN in this case).

Offering them when I want to add a printer is passable, but presenting them as configured printers by default is ridiculous. It appears I have to remove them one-by-one (ain't gonna happen), and it's not even clear that that will be in any way permanent.

We're not all on nice cosy little home networks.

At least make it optional, please.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: system-config-printer-gnome 1.3.12+20130308-0ubuntu4
ProcVersionSignature: Ubuntu 3.8.0-19.30-generic 3.8.8
Uname: Linux 3.8.0-19-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
CupsErrorLog:
 W [09/May/2013:08:03:00 +1200] Please move "SystemGroup lpadmin" on line 16 of /etc/cups/cupsd.conf to the /etc/cups/cups-files.conf file; this will become an error in a future release.
 W [09/May/2013:08:03:00 +1200] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id 'facmed-laser-it-Gray..' already exists
 W [09/May/2013:08:03:00 +1200] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id 'facmed-laser-it-RGB..' already exists
 W [09/May/2013:08:03:00 +1200] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id 'facmed-laser-it-ps-Gray..' already exists
 E [09/May/2013:12:54:50 +1200] [cups-driverd] Bad driver information file "/usr/share/cups/drv/cupsfilters.drv"!
Date: Thu May 9 13:01:08 2013
InstallationDate: Installed on 2013-03-15 (54 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MachineType: Apple Inc. Macmini6,2
MarkForUpload: True
PackageArchitecture: all
Papersize: a4
PpdFiles:
 facmed-laser-it: HP LaserJet 4250 pcl3, hpcups 3.13.3
 facmed-laser-it-ps: HP LaserJet 4250 Postscript (recommended)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic root=UUID=77e44b8f-c46d-44ba-a999-d6962993dda8 ro quiet splash vt.handoff=7
SourcePackage: system-config-printer
UpgradeStatus: Upgraded to raring on 2013-05-03 (5 days ago)
dmi.bios.date: 11/16/2012
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MM61.88Z.0106.B03.1211161202
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-F65AE981FFA204ED
dmi.board.vendor: Apple Inc.
dmi.board.version: Macmini6,2
dmi.chassis.type: 16
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F65AE981FFA204ED
dmi.modalias: dmi:bvnAppleInc.:bvrMM61.88Z.0106.B03.1211161202:bd11/16/2012:svnAppleInc.:pnMacmini6,2:pvr1.0:rvnAppleInc.:rnMac-F65AE981FFA204ED:rvrMacmini6,2:cvnAppleInc.:ct16:cvrMac-F65AE981FFA204ED:
dmi.product.name: Macmini6,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CupsErrorLog: E [07/Dec/2018:13:42:38 +1300] [cups-deviced] PID 15115 (gutenprint52+usb) stopped with status 1!
CurrentDesktop: GNOME
DistroRelease: Ubuntu 18.04
EcryptfsInUse: Yes
InstallationDate: Installed on 2017-01-09 (696 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
Lpstat: device for ljps: ipp://facmed-laser-it/ipp
MachineType: Apple Inc. Macmini6,2
NonfreeKernelModules: wl
Package: system-config-printer 1.5.11-1ubuntu2
PackageArchitecture: all
Papersize: a4
PpdFiles: Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/ljps.ppd'] failed with exit code 2: grep: /etc/cups/ppd/ljps.ppd: Permission denied
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-36-generic root=UUID=305f7448-19cc-4832-9e07-b21d2b7e5e39 ro quiet splash vt.handoff=1
ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18
Tags: bionic
Uname: Linux 4.15.0-36-generic x86_64
UpgradeStatus: Upgraded to bionic on 2018-05-06 (214 days ago)
UserGroups: adm cdrom dip docker libvirt lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 10/20/2016
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MM61.88Z.0106.B0B.1610201654
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-F65AE981FFA204ED
dmi.board.vendor: Apple Inc.
dmi.board.version: Macmini6,2
dmi.chassis.type: 16
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F65AE981FFA204ED
dmi.modalias: dmi:bvnAppleInc.:bvrMM61.88Z.0106.B0B.1610201654:bd10/20/2016:svnAppleInc.:pnMacmini6,2:pvr1.0:rvnAppleInc.:rnMac-F65AE981FFA204ED:rvrMacmini6,2:cvnAppleInc.:ct16:cvrMac-F65AE981FFA204ED:
dmi.product.family: Macmini
dmi.product.name: Macmini6,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.