Postcard from The Big Draw

The Big Draw is a campaign whose aim is to get everyone drawing. They claim "Drawing helps us to think, invent and communicate – regardless of age and ability." Filling a wall with Etch-a-Sketches is guaranteed to tempt passers by at the MAC to have a go. Critical design fault though: you can't shake the frames to erase previous 'scribbles'. Which means that only the highest placed had room for new 'drawing' and those of us who are not so tall couldn't reach them.

What would you guess to be the most common 'sketch' made? Yup, names. Why pass up an opportunity to tag your graffiti?