Police in Perth and Kinross say they have confiscated more than 300 litres of alcohol from under age drinkers over the last few weeks.
Officers have also caught several people who bought alcohol for the youngsters, Tayside Police said.
The drink was taken during dedicated patrols in the evenings and weekends over the school summer holidays.
Sgt Julie Robertson said the under age drinking often led onto other antisocial and criminal behaviour.
"Officers will continue to tackle the problems of under age drinking as long as it remains," she said.
"We know that the amount of alcohol we seize or prevent from going into the wrong hands has a knock-on effect in reducing occurrences of vandalism, assaults, and youths causing annoyance calls."
"These are the things which have a direct impact on communities and affect people's quality of life."