for some, obviously the only way to 'enhance' security is just to add more to the existing theatre.
For others, it requires a critical look at, and risk analysis of what is currently being done - keeping the elements proven to reduce risk for a reasonable cost, abandoning the rest and perhaps implementing other strategies not currently in use - like screening at the same level for all persons entering the 'sterile' area (an oxymoron if ever there was one) as one example.
But as posted dismissively above, in regard to a response to enhancing security - handing out tin badges to clerks, employing clerks with attitude, checking someone has a drivers licence etc, etc does nothing to enhance security either, yet the TSA introduced it and trumpets it as somehow useful.
None of these things happen at our airports.
Yes Australia and Australian's have been the target of terrorist activity.
Yes it probably will happen again.
We prefer to take a risk/benefit approach to security - not a theatrical one.