very accurate profiling tool
No, it’s not.
Despite this, the proposed fixes focus on the details of the plot rather than the broad threat. We’re going to install full-body scanners, even though there are lots of ways to hide PETN – stuff it in a body cavity, spread it thinly on a garment – from the machines. We’re going to profile people traveling from 14 countries, even though it’s easy for a terrorist to travel from a different country. Seating requirements for the last hour of flight were the most ridiculous example.
The problem with all these measures is that they’re only effective if we guess the plot correctly. Defending against a particular tactic or target makes sense if tactics and targets are few. But there are hundreds of tactics and millions of targets, so all these measures will do is force the terrorists to make a minor modification to their plot.
It’s magical thinking: If we defend against what the terrorists did last time, we’ll somehow defend against what they do next time. Of course this doesn’t work. We take away guns and bombs, so the terrorists use box cutters. We take away box cutters and corkscrews, and the terrorists hide explosives in their shoes. We screen shoes, they use liquids. We limit liquids, they sew PETN into their underwear. We implement full-body scanners, and they’re going to do something else. This is a stupid game; we should stop playing it.
Statistical profiling does not work.
There are two kinds of profiling. There’s behavioral profiling based on how someone acts, and there’s automatic profiling based on name, nationality, method of ticket purchase, and so on. The first one can be effective, but is very hard to do right. The second one makes us all less safe. The problem with automatic profiling is that it doesn’t work.
Terrorists can figure out how to beat any profiling system.
Terrorists don’t fit a profile and cannot be plucked out of crowds by computers. They’re European, Asian, African, Hispanic, and Middle Eastern, male and female, young and old. Umar Farouk Abdul Mutallab was Nigerian. Richard Reid, the shoe bomber, was British with a Jamaican father. Germaine Lindsay, one of the 7/7 London bombers, was Afro-Caribbean. Dirty bomb suspect Jose Padilla was Hispanic-American. The 2002 Bali terrorists were Indonesian. Timothy McVeigh was a white American. So was the Unabomber. The Chechen terrorists who blew up two Russian planes in 2004 were female. Palestinian terrorists routinely recruit “clean” suicide bombers, and have used unsuspecting Westerners as bomb carriers.
Without an accurate profile, the system can be statistically demonstrated to be no more effective than random screening.
And, even worse, profiling creates two paths through security: one with less scrutiny and one with more. And once you do that, you invite the terrorists to take the path with less scrutiny. That is, a terrorist group can safely probe any profiling system and figure out how to beat the profile. And once they do, they’re going to get through airport security with the minimum level of screening every time.
As counterintuitive as it may seem, we’re all more secure when we randomly select people for secondary screening — even if it means occasionally screening wheelchair-bound grandmothers and innocent looking children. And, as an added bonus, it doesn’t needlessly anger the ethnic groups we need on our side if we’re going to be more secure against terrorism.