Some thoughts -
(a) have you ever tried to push open a door in flight ? I had a door unlatch on an Aztec years ago with only me in the aircraft (and, yes, I did latch it correctly - a maintenance related problem). I had a dickens of a time to get the door relatched. Trying to push it open in other than significantly yawed flight conditions was pretty well impossible - and I am talking only an inch or two.
(b) with a flying tailplane, pitch oscillations are disconcerting and I understand that this is a pretty general observation.
(c) why would you want to use speedbrakes in a forced landing situation other than to correct a misjudged glidepath ? Sideslip is much more reliable I would suggest
(d) I would be far more concerned with poor flightpath control and unintended stalling whilst playing with the doors.
or is this thread just a wind up ?