When multiple users are logged in, users can be switched without going to login screen

[Doug McMahon]

Thereby bypassing the need to enter a users password
admin-to-doug1 screen shows picking doug1 from indicator, I'm then logged into a perfectly usable doug1 session, no password required
From doug1 I then can likewise login to doug (admin), again without password. Sometimes completely use-able, other times ranges from un-useable to semi-useable
screen semi-useable shows that
What I'm expecting is that whenever switching users, logged in or not, to be brought to login screen to enter the user's password

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: indicator-session 0.3.3.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3
Uname: Linux 3.0.0-9-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Tue Aug 30 11:36:05 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha i386 (20110826.1)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: indicator-session
UpgradeStatus: No upgrade log present (probably fresh install)

[Doug McMahon (mc3man)]

Still see the same on a beta 1 install, the only diff. is that when a 'standard' user switches to the still logged in admin user that the session will be completely usable, - the no password needed still happening

[Doug McMahon (mc3man)]

This also includes a guest user who can switch to any other logged in user, no password needed (also can bypass a locked screen. Maybe this is intended, doesn't seem to make much sense. (see similar in 11.04 except guest is restricted.
If the "Switch from <username> always goes to the login screen (password then required), why is it allowed to just click on a user and go directly to their login