Lets be honest, it does not take much thought to work out how to get a person/package/or anything else, airside at any airport, and not much more thought as to how to get it on an aircraft.
The gripes and moans we all hear are aimed at the section of security who 'check' passengers as they go airside. It is a very public event and it may put off the opportunist, and yes it might just stop an amateur terrorist. However it is a brave politician who says 'enough' and lets remove this charade and make passenger and baggage screening realistic.
I would suggest that it is impossible to have 100% security whilst moving millions of people and baggage. The best security measures are those that occur in the background to which most people have little or no knowledge.
Frisking pensioners just makes some travellers feel happier travelling by air, but in reality does little else.