I don't think tailgaiting is classed as driving like a hoon.
ROAD TRAFFIC ACT 1974 - SECT 78A
circumstances of aggravation means circumstances in which —
(a) the vehicle is being used to race another vehicle;
(b) the vehicle is being used in an attempt to establish or break a speed record;
(c ) the speed, or the acceleration, braking or steering capability, of the vehicle is being tested or contested in any way;
(d) the skill of the vehicle’s driver is being tested or contested in any way;
(e) the vehicle is driven in a manner that causes smoke to come from one or more of the vehicle’s tyres or a substance on the driving surface; or
(f) the vehicle is driven in a manner that causes one or more of the vehicle’s driving wheels to lose traction with the driving surface;