Among the things highlighted by the Nigerian underpants bomber case is that the bits of information that could have been collated to construct a red flag were in different countries, and he complicated it further through his route to the USA. For example, the fact of his UK visa refusal apparently never entered into the calculation about whether he could get on a plane to Detroit. And we still don't know what Saudi Arabia and Yemen know about his recent travels or who else they told. But is the world ready for the sharing of such administrative information on a large scale? With the alternative being an increasingly absurd system on checks for all passengers which will quitely build support for profiling, it will have to be considered.
UPDATE: And we reinstate our campaign to apply the term securocrats to the people in charge who believe that we are just one more restriction on passenger behaviour away from complete airline security.