WOTC - Verbal security threat on airline

I asked this question in the Wisdom of the Crowd:

If a passenger makes a verbal security threat, what should the airline do?

Here are the responses: (46 Votes)

52 % - Carry out a second security check and delay the flight by another two hours.
30 % - Delay the flight, even if it may cause inconvenience to the passengers, especially those with children and infants, and cause missed connecting flights.
17 % - If the security threat is incredible, ignore it and depart on time.

See the pie chart at: 
http://www.wisdomofthecrowd.sg/chart.aspx?ID=1312