People ask why the plinths were not bolted down. Well, people are warned to be cautious in that room but the idea was that they should be delicate, exposed, and fragile. They are crowns, and crowns—symbols of power, are fragile things. A well-timed selfie could bring down a president. And anyway, you can do your best to make things idiot-proof, but eventually someone will make a better idiot.