The simplest approach would be to modify the create current user code to abort cleanly if the user did such a thing, then stickaround would come back true (because the current user would not have a pre-boot account etc). So yes, it's certainly possible to achieve this behavior, and probably pretty simply as well.
In v5.50 you could use the "terminate" and "cancel" events that the new login box throws to make this decision, in the earlier versions I guess you could just inspect the returned password to see if it was the default or not.
I guess it is reasonable request to add this option as part of statndard Autodomain package, if so when can I get a copy of this.
I am aware of Autodomain 5.25 package and not 5.5 ?, what are you referring to ?
You can follow progress of v5.50 on my blog - http://simonhunt.wordpress.com.
As to the request, throw it via your McAfee account manager and professional services team, eventually I guess it will make its way up to me or one of my team once the T&C have been worked out.