Illegal Rave

Apparently:

In 1994 the then Conservative home secretary, Michael Howard, introduced the Criminal Justice Act to tackle unlicensed raves. Zero-tolerance policing and legislation that banned gatherings of more than 10 people listening to music "wholly or predominantly characterised by the emission of a succession of repetitive beats" drove many abroad.

Where does a government get off banning dance music/parties? Who does it hurt? Perhaps noise pollution, trespass, drug/alcohol abuse are factors, but there is already legislation against that stuff. Do we really need to ban everything to protect ourselves?!