In Victoria we're not allowed to drive on a beach. But in New South Wales and Queensland it seems that the beach is assumed to be a highway. It's a shocking sight, and cannot be sustained surely.
This is the access to the beach at Lighthouse Beach, Port Macquarie and the second photo shows the damage being done on the beach by 4-wheelers. And who knows what unseen damage is being done to microscopic creatures and nesting birds.