I don't think it ever hurts to bring to "the system's" attention any matter which you, as a sensible, precautionary, adult considers a potential security risk. It is then for "the system" to take this info, consider it appropriately and act or not act. We have to accept that "the system" (be it of an airline, a City/Wall Street bank, an airport, a high-rise building in a capital city, nuclear power-plant, toxic waste disposal unit, pharmaceutical company) has the knowledge and expertise to assess risk in its environment and the willingness to take positive action to minimise/eliminate harm to the general public.
The problem highlighted by the rash and in some cases ludicrous reactions to 9/11 at airports and with airlines is that the majority of the travelling public and flight/cabin crew do not see the majority of new measures as enhancing or in any way improving security on board.
Before anyone works at an airport/airline they should be stringently scrutinised by the host country's security/police service and given a clearance which should include fingerprinting. Security cards, with photos no older than 6m and fingerprints, then issued. Random comparison of the prints on the cards and the person carrying the card to be undertaken at all airports/airlines by an external agency. A mismatch means immediate arrest for the carrier of the card and the person to whom it was issued and their suspension for all time from work with any airport/airline.
For the travelling public, in the UK at least there seemed to be little problem with the one small bag (preferably see-through) to carry on - in fact in various queues I found myself in people were almost vying to have the most effective bag for security folks to check! Dutyfree alcohol and other glassware purchases are the next problem - in the right hands the smallest item (or no item at all) can be deadly. So why not a specific lockable overhead bin for duty-free only? pax to be relieved of purchases while waiting in lounge? then the chance of a drunk angry person waving their own giant bottle around is lessened...
Nothing will prevent a determined criminal/terrorist from attempting to pursue their aims, but like all good crime prevention, all measures introduced should be to make it so tedious that airports and airlines and other likely targets are just too difficult. Downside? non key targets might be selected but when the aim of the current situation appears to be global terror this is less likely.
As with everything, there is one truth. Security measures that should be in place may not be in all sorts of industries and it is vital that the whistle-blower in those industries has a means by which his/her genuine concerns can be raised to appropriate authorities - often the larger the organisation the less possible it is for someone down the "food chain" to air concerns!
JMHO
