The driving course might be a great idea - I never investigated it, but thought I had heard you'd get a break on insurance premiums if they went through a class. Though I'm not sure stock car racing would count.
As for the driver, not knowing any of the circumstances, or what the terrain in the location was like, I'd say no discipline would be warranted. I acidentally put the forks of a tractor through the side of the shop at a former employers, trying to stack up skids. When the boss started yelling, I yelled right back, that if he had gotten the brakes fixed any time in the last 3 months, it wouldn't have happened. (this thing had no brakes at all for an entire season, and you had to stop by throwing it in reverse)