Police in Ballasalla say people won't be allowed to use school grounds, if they can't do so responsibly.
The warning comes after plant pots at the village's primary school were tipped over and urinated on.
Officers say anyone behaving in an antisocial manner, whether on school grounds or not, over the summer months, will be dealt with promptly, and taken home to parents/ guardians where necessary.
The SNPT is asking parents to pass this message to their children.
Red weather warning issued for coastal overtopping
It will come into effect on Tuesday at 2:30pm
Motorists' post about 'raised metal' raises awareness for other drivers
Claire Losh had two flat tyres
20mph drop-in session in the south today
It's part of the Department of Infrastructure's ongoing consultation
Amber weather warning issued with more heavy rain forecast
20-30mm of rainfall expected over nine-hour period
Severe gale force winds threaten Tuesday's sailings
All of tomorrow's crossings are at risk of disruption