not possible to create connection with no IP addresses

[Mikhail A]

It does not seem to be possible to create network connections with no IP addresses., for example for passive monitoring of existing link.

To reproduce:
(1) In nm-connection-editor, create a new connection of type 'Ethernet'.
(2) In "IPv4 settings", set Method to "Disabled"
(3) In "IPv6 settings", set Method to "Ignore".
(4) Hit "Save"
(5) Click on newly-created connection and hit "Edit". Look at the IPv6 tab

What I expected to happen:
  The Method is set to Ignore.

What happened instead:
  The Method is set to Automatic.

Follow up:
(6) set Method to "Ignore"
(7) Hit "Save". Observe error message: The property 'NMSettingIP6Config' / 'method' is invalid: 1
(8) Try to repeat same operation with kde-nm-connection-editor. This editor will silently ignore any errors which disable both connections.

Other info:
$ lsb_release -rd
Description: Ubuntu 14.04 LTS
Release: 14.04
$ apt-cache policy network-manager
network-manager:
  Installed: 0.9.8.8-0ubuntu7
  Candidate: 0.9.8.8-0ubuntu7
  Version table:
 *** 0.9.8.8-0ubuntu7 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Roger James (rogerjames99)]

This bug also affects me. I just want an interface that nothing is sent out on and with no addresses, for my switch's monitor port.

[Zaia B (zennu)]

This issue affects me as well.
Setting IPv4 to Disabled, IPv6 to Ignore, and clicking Save... gives the error, "The property 'NMSettingIP6Config' / 'method' is invalid: 1".
Ubuntu 14.04 (amd64) with network-manager version 0.9.8.8-0ubuntu7.

Is an interface not intended to *only* receive incoming frames ?