Wouldn't do that one at PPL to be honest but would do it converting onto a type with electric trimmer. And its not an exercise we do in the sim on the bigger things. We have multiple ways of killing the power to the trimmer.
But I would give them to sort the trim out but wouldn't expect them to land in that condition.
I would imagine in the tommy quite a few folk wouldn't have the sheer brute strength to fly it for a prelonged period with the trim full in any direction and I would be also be worried about them breaking the clutch on the trimmer.