It’s not silly on the order of trying to color code terrorism as we did in the wake of 9/11, but metal detectors installed at stadiums by Major League Baseball the season after the Boston Marathon bombing, aren’t likely to do much good. Bruce Schneier, security expert in matters both online and off, writes of the new measure at the Washington Post. The opening:

Fans attending Major League Baseball games are being greeted in a new way this year: with metal detectors at the ballparks. Touted as a counterterrorism measure, they’re nothing of the sort. They’re pure security theater: They look good without doing anything to make us safer. We’re stuck with them because of a combination of buck passing, CYA thinking and fear.

As a security measure, the new devices are laughable. The ballpark metal detectors are much more lax than the ones at an airport checkpoint. They aren’t very sensitive — people with phones and keys in their pockets are sailing through — and there are no X-ray machines. Bags get the same cursory search they’ve gotten for years. And fans wanting to avoid the detectors can opt for a “light pat-down search” instead.

There’s no evidence that this new measure makes anyone safer. A halfway competent ticketholder would have no trouble sneaking a gun into the stadium. For that matter, a bomb exploded at a crowded checkpoint would be no less deadly than one exploded in the stands. These measures will, at best, be effective at stopping the random baseball fan who’s carrying a gun or knife into the stadium. That may be a good idea, but unless there’s been a recent spate of fan shootings and stabbings at baseball games — and there hasn’t — this is a whole lot of time and money being spent to combat an imaginary threat.•