HD scenario, what to do: Your door gets kicked down

[waloidian]

during the middle of the night. You grab your HD weapon...what do you do? Do you run out guns ablazin shooting up whatever you see? Do you call out for identification first? Do you flip your tac light on and off to identify? Warn the intruder of impending gunfire? Take a defensive position, and wait to ambush them? Is kicking down the door enough of a threat to warrant deadly force? What if the intruders claim they are police?

I know its a far fetched scenario, but I was reading about some thieves that would use the door kick down to enter a residence and its a bit different than the scenarios i prepare for where a theif is trying to be covert and coming through a window, or a picked door...thus setting off an alarm or dog, or whatever alert system you use.

How much proof do you need to identify true law enforcement? afterall , anyone can buy a shiny badge and or yell out that they are police...it'd be nice to have a string of threads that deal with all kinds of hypotheticals, whether it be at home, or in public.

edit: just a reminder that this situation is becoming more of a reality...
Rogue Minutemen leader held in fatal home invasion - CNN.com