Whilst I hate to quote Mr. 'Aviation' Learmount
... of course, the passenger encounters the ultimate proof of what a charade the overall security policy for airports is once he/she gets airside. You can buy a large glass bottle of duty-free liquor to carry with you. Large glass bottles, as members of street gangs know, when broken are truly fearsome weapons...
plus
..The duplicity of the policymaking government departments who know this full well is absolutely breathtaking...
That's it, in a nutshell, really.
