One of the best ways to prevent repeat offenders doing this stupid stuff again is two-fold.
1. GPS tracking
2. Black box in car
Black box records times and speeds, GPS to see where they were doing said speeds.
Oh and TIR60, you say that but how can you decide that its ok to cripple someone? Working in the CTP or greenslip industry we see millions spent to rehabilitate people involved in accidents as well as modifying their homes and work places to adjust them to their new needs. You as a driver owning a sports car do not have the right to choose for someone else, its your choice to speed or do something stupid but alot of the time others pay for it.
For the record though, if I ever got hurt by idiots street racing and lost ANY of my motor functions I would pay it forward to those responsible, in the court system you can get their address and it would be a pleasure to peel your skin off your face for crippling me =P