You should look at the MSIC requirements. It's even more hilarious than the ASIC (mind you, at least you can't get an ASIC on the basis of holding a MSIC). It used to say that if you had attempted an act of piracy you would be refused one!
Having worked at Heathrow when the IRA were at their peak and the BAA 'brown army' of security guards were engaged, I can safely say that civil airports are basically indefensible. Unless that is, as was done by the RAF Regiment in Oman, you use ground mapping radar and other devices and bomb the F out of any contact with 80 mm mortars.
Like the crap we put up when traveling on commercial airlines , its basically a sham to con the gullible into thinking they are safe and making private security firms a bloody fortune. Not to mention that they pay peanuts and get monkeys that are probably only rudimentary screened in the first place. Ahmed on the scanner?????