Casey Smith, who makes art technology under the label Junkfunnel Labs has designed this Suspicious Looking Device, the only function of which is “to appear as suspicious as possible, whether carried in hand or placed indiscrimately in public places.” The SLD contains LEDs, a LED array, a character display, an optical distance sensor, capacitive touch sensor, buzzer, and motors.
His other designs (inventions?) include The Technology Detector, The Terror-o-meter, The Phantasy Phone, an Idle Hands device, “Haiku” and “Escapement”.
A worry for the airport authorities. Try bringing this one onto your next flight.