Bomb threats on flights: What should passengers do?

The last three days have seen over 10 flights being diverted due to bomb threats. From the B777 landing at Iqaluit Airport in Canada, to fighter aircraft escorting an aircraft near Singapore, it has been turbulent for airlines, passengers, airports, security apparatus and the government. As more investigations take place on where these threats are coming from and what action needs to be taken to avoid this in future, one thing remains steadfastly clear - zero tolerance to threats, as has been reiterated by the head of BCAS (Bureau of Civil Aviation Security) the nodal body for security in India.