I don't know about that.
There's always situations which make me shudder when I think how easily they could go wrong. For example, when a train that is scheduled to run fast through East Croydon stops for a red signal at one end of the platform, it will generally be wholly in the platform, given the alignment and signal spacing. Even if this train is clearly branded "Express" and/or announced as non-stopping (generally by the automatic announcer), at least one passenger will generally attempt to board whilst it is stationary. This will principally involve them waving their arms at it and jabbing the "Door Open" button or attempting to open the guard's door. When they are advised (normally by staff or, in some cases, another passenger!) that the train does not call at the station and that it will depart shortly, they usually move away, but not always. Despite the fact that the train has a single slam door which could easily have been tampered with, and this could be dangerous, and also the fact that the passenger could have become tangled in the train or may be in contact with it in other ways, it is not normal for dispatch procedure to be followed, and the signal changing to Off will generally result in immediate departure.
One of these days, a passenger will become caught up in the train, with serious consequences; then all the staff will doubtless have to follow very careful procedures. Until then... who knows what "should" be done?