[Ford17]

The mower has a 'duty of care', and any breach of that duty forms a case for negligence.

Anyone who can show actual damage caused by his breach (of his duty of care) can sue him for negligence as a civil matter, even as minor debt claim through a Magistrates court, for the value of the damages.

The filing fee to lodge such a claim, depending on the value of the damages, would probably be ~ $100.

That's basically what you can do to bring these type of people to account.