Was anyones safety ever in jeopardy. No.
Even the magistrates are complicit in the fear mongering.
With all due respect, I disagree with your point. Whilst you and I know that she could not have opened the door midflight, the rest of the passenger cabin did not know this and there is untold potential for mayhem in the cabin with someone attempting to 'open' a door. I have little tolerance for any form of behaviour in the pax cabin that endangers, or could be interpereted as endangering the safety of the aircraft and its occupants.
I am pleased to see a magistrate who is willing to prosecute, even if its on a somewhat irrelevant basis - terrorism is not really the point here - there are surely more relevant points to the safety of this flight and its pax that could have been used in the judgement.