Hide / Disable Local PC login option?

My users have finally become a little more used to Windows 7 netwrok login boxes with the tweaks that Hide Last User Name and other customizations. However, one major annoyance I would like to see go away is the default option that reverts to log into local PC if you mis-type domain login.

For example, via GPO I have the default domain to log into set. But if the user makes a typo and the computer denies domain login access it immediately switched to "Log on to: Local PC Name" assuming you must not have meant login to domain. But the users dont catch this and knwoing they just made a typo re-enter the login info for the domain. But now its set for Local PC and, of course, it again doesnt allow them access because all my usewrs dont have local accounts.

Way to fix it so it always stays with domain as target and no option for local (unless of course you knwo to ass the prefix localPCname\username)?