I wonder just how many that had paid big money to do a track day there, were held up for a considerable amount of time whilst the track owners staff shoveled up this pricks mess and replaced the armco.
The only positive I can gleen out of this, is that the knob concerned will probably not have been insured, and he'll have faced an enormous bill for both the clean up operation and armco replacement.
He may think twice before trying to show everyone just how shite a driver he really is next time.