interesting then and i agree with Danny is that nearly everytime i,m at a Greek airport we have pax on board that have walked through 'security' that have managed to board the wrong flight !!.
Gate staff in Greece and to a lesser extent Spain seem to have no comprehension of the implications of not even checking the destination on the boarding card. As far as i see it there is no point at all in the Caa making operators put 'shed' bolts on flight deck doors when the places we fly into have dubious security. A chain is only as good as it's weakest link.