With exchanges, the cure is quite simple: stop breaking bad trades. If Goldman had to eat every fat finger error, the would adopt better procedures for avoiding them..
That might be a cure for Goldman fat fingers, but it won't be a cure for an exchange's security problems. If an entity gets a bad trade due to fraudulent security violations, It seems fair for them to expect the exchange to bust that trade.
That is the #1 part of the last Batman movie that annoyed me. "ohh he's broke because ... of an attack on the stock exchange during which a giant totally weird trade was made".
A solid amount of suspension of disbelief is necessary to enjoy Christopher Nolan movies. It's quite awkward, actually, but it works because people love a good story more than reality (, which is quite relevant to entrepreneurship / pitching! :-) )