In all honesty - is crashing into a tree / wall the best possible thing that can happen to them?
Sometimes I think "I hope he gets stopped or flashed." But then that's just going to annoy and probably won't stop them doing it in future.
If they ended up wrapped round a tree, it'd mean that both the tosser and his suped-up car are off the road permanently. Which can only be a good thing.
I know it sounds eeeeeeeevil but I don't think there's a better thing that could happen to them.