This week, the Transportation Security Administration had to reiterate a previous ruling ruling on Batarangs. The non-lethal weapon of choice for Gotham City's own Batman, are among the likes of liquids, lighters, dynamite and fireworks and, as such, should not be included in passengers' carry-on.
The issue was reignited last week when someone attempted to bring three batarangs on a plane leaving San Francisco International Airport. Predictably, the TSA was having none of that.
"Passengers are not allowed to bring anything on a plane that resembles a weapon, so anything like a boomerang or anything like that would not be permitted in the airplane cabin," said Mike England, a TSA spokesman, in an interview with The Hollywood Reporter.
The link between batarangs and actual weapons might not be immediately apparent -- they are fictional weapons, after all. But the custom weapons market is an imaginative one, and anyone in doubt of the lethality of customer-made batarangs need only look at the TSA's Instagram account, which is full of some very severe, very metal and very sharp replica crime-fighting tools.