Having spent the greater part of my career as a Flight Engineer, It was drilled into all crew to treat every aircraft as just left the hangar, to scan all the panels to ensure ALL switches were in the correct position prior to engine start. The ground engineer in this instance may or may not have left the Pressurization controller in MANUAL. We will never know
This is not the point.....it seems to me to point to negligence on behalf of the Flight Crew, not the first time a crew member has made a mistake!
I remember in the early days of my career reading about a DC8 crew being imprisoned after departing the runway upon landing at Athens. The result of incorrect weather broadcast from the airport about runway conditions!
This country is still in the middle ages regards some of its laws.
I am now a self employed Ground Engineer and carry a large part of my flying thought processes in to my present position, heaven forbid should I ever make a mistake whilst in Greece!