A simple idea of using 404 page not found errors to display photos of missing children.
Source: notfound.org via BCM Group on BCM Flock
Source: via Alan Kewley on BCM Flock
Source: via Dwayne Smith on BCM Flock
Source: via Christy Peacock on BCM Flock
Source: via James Fewtrell on BCM Flock
Source: via BCM Group on BCM Flock