Saw this article on stuff. The insurance company was trying to recoup costs from a 15yo.
http://www.stuff.co.nz/business/money/9777895/Cricket-accident-leads-to-big-bill
I think the parents argument that parking next to a cricket ground makes the owner liable is rubbish as it might have been the only park available in the street. Yes he is only a minor playing sport but damage did occur and someone still has to be liable and I don't think it should be the owner of the car.
Its no different than kids playing on the street and accidentally breaking someones window with a ball.