Nice thread.... good for a rant
Door one is a big one for me, although I do also take advantage of the game flaw sometimes! (I know but I blame the game)
The other one I hate is shouting "Police get down now!" several times throughout the mission, having the flashlight on, running etc when quite simply in some situations, this would cause a mass suspect panic.... and then shootout.
Therefore, I get really frustrated when the element of surprise is ruined by idiotic noise!!!!