Graffiti showing male genitalia is ruining young families' trips to the Margaret Mahy Family Playground.
Mother-of-three Lauren Tyrrell, who takes her sons Ollie, Finn and Lincoln to the playground as a treat, said the marks, thought to have been made by Lime scooters on the playground's pavers, are awful.
"This kind of spoils it. It's such a shame, it's such a nice playground," she said.
"It'll just be some young d*** ruining it for someone else."
She said the marks made the playground look "tacky" and they should be removed as soon as possible.