MIG wrote:

An unfortunate thing to do but, unlike a closing door, it wouldn't
actually squash someone and risk any other number of consequences,
such as falling, bits getting caught etc.

Are the doors really that forceful?

Why can't the doors be equipped with a bounce-back feature that reopens
them if they hit an obstruction? I can understand not implementing such
a feature when the doors are closing so the train can leave the station,
but if the doors are closing merely for passenger comfort (and the train
isn't about to leave just yet), then such a feature wouldn't delay service.
--
David of Broadway
New York, NY, USA