About 100 pupils from Dunedin schools sat quietly on the tennis courts forming the letters SADD to raise awareness of the group and celebrate Sadd Week (August 13-19).
Although they could not be heard, their message could certainly be seen - even by passing aircraft.
Sadd Lower South Island regional co-ordinator Kelly Selwyn said the event was one of many held around Otago this week, including the placement of a crashed car and white crosses in the centre plot of Oamaru's main street, and the release of 70 red balloons in the Octagon in Dunedin yesterday.
"Releasing the balloons represents the 700 teens who have died on New Zealand roads in the past decade."
She said the message being spread this week had been that 130 people died on New Zealand roads every year because of drinking and driving, thousands more were injured or seriously injured, and it had a social cost of about $900 million a year.
"Young drivers are over-represented in all key statistics around alcohol-related crashes. Over three years, 41% of fatalities in alcohol-related crashes were people aged 15 to 19," she said.
