Login screen doesn't respect the draw-user-backgrounds setting

[JK]

I don't want my wallpaper to be shown on the login and lock screens. So I used dconf-editor to change the "draw-user-backgrounds" setting to "false".

What I expected to happen:
- The login screen as well as the lock screen would respect the setting (neither would show my wallpaper).

What actually happened:
- The lock screen respects the setting as desired (it no longer shows my wallpaper).
- The login screen does NOT respect the setting (it continues to show my wallpaper).

Now I'm not asking to introduce a new feature or setting, it's already there. All I'm asking is that the login screen be consistent with the lock screen and respect the "draw-user-backgrounds" setting.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: unity-greeter 16.10.2.2
ProcVersionSignature: Ubuntu 4.8.0-28.30-generic 4.8.6
Uname: Linux 4.8.0-28-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Dec 2 18:23:53 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-11-23 (8 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: unity-greeter
UpgradeStatus: No upgrade log present (probably fresh install)