OK, let's try a little experiment.
Suppose you're in charge of the London Underground, and you're having the slight annoyance of an occasional passenger being run over by a train.
You could:
1. play a recording saying "Mind the gap" every ten seconds or
2. put a wall with sliding doors between the platform and the train.
Which one would you choose?
You're not listening. MtGox built their own subway with flawed doors. Only MtGox can fix those doors.