Now, a headteacher in the United States has put a video on the internet to help nab a pair of vandals.

Two teenagers had used a basketball to knock out a CCTV camera at Sunset Elementary in Utah so they could break into a portable classroom. But a second camera had recorded their every move.

Don Beatty, the school’s principal, edited the video and posted it on YouTube with a $50 (pound;25) reward for information. A few days later, he got a tip-off. The boys have since been charged with criminal mischief.

As for stupidity? Guilty as charged.