Mandurah residents say they have had enough of teenage hoons on motorbikes and scooters tearing up a local oval.
The group have been terrorising Peelwood Reserve in Halls Head for months now.
The youths have been captured on video deliberately ripping up the grass with their bikes.
They also threaten and abuse people who use the oval, including children during sports training and game days.

The damage left by the teenage hoons. PIC: 7News
Speaking on 7News, Mandurah City FC Vice President Iain McLean said they are fed up with the boys dangerous behaviour.
"These kids on scooters just do not care, they'll ride through, they'll make it towards the kids and towards the coaches, they'll be abusive," he said.
"There's a real fear of not being secure and safe in an environment that's a community club."

Mandurah City FC Vice President Iain McLean. PIC: 7News
Parent Renee Cowling said other parents are worried about dropping their children off at training.
"I know a lot of parents are concerned about their kids' safety and often stay now because they're worried about the kids turning up or getting a golf ball hit at them or the kids on the motorbike run into the kids so it is pretty scary," she told 7News.
"We ring the police but unfortunately sometimes it takes 40 minutes for them to get here."
Peelwood Reserve is the home of the Mandurah City Football Club and at times the club have been forced to call off games or relocate them due to the damaged pitches.
They are calling on the council to build a fence around the oval to keep the hoons out.
Perth to Bunbury train service returns
Missing woman found safe and well
Southern suburbs electrician claims $1.8 million Lotto win
Works continue on Pinjarra's Munday Avenue extension
Halls Head support worker charged with historic child sex offences
Severe thunderstorm warning cancelled for Mandurah, Bunbury
Fortnightly red bin collections to remain in the City of Rockingham after council rejects motion
Rate rises on the way for Rockingham, Mandurah ratepayers
Harvey Police call on witnesses to serious crash