If he was stupid/arrogant enough to turn down the offer of a driver awareness day (which admittedly iis a pretty dull and boring way to spend a day, plus about a hundred quid) he deserves everything he got.
Driving without reasonable consideration for other road users (inconsiderate driving). Offence under the Road Traffic Act 1988 section 3.
If you scare the s*** out of another road user you are not acting with reasonable consideration. Case closed.