It has to be said, this was very poorly handled by AFP and SY airport corporation. 4hrs to remove the person in question effectively stopping operations into Sydney airport at a peak period. Twitter post at the time it was clear he was a nutter with his rambling the probability of a device is minimal if any AFP should have just entered the aircraft but I guess it would of taken 4hrs for the approval of stairs to be towed on A and then finding swissport staff.
SY airport should have been able to manage a regular flow, it took them 5hrs to NOTAM the use of A5 could have NOTAM RWY closed past B8 turbo props and NB jets could have maintained their schedule instead of the displacement of thousands of ppl.