What happens when vandals are caught?

Nothing really.

From Hansard:

Genia McCaffery, President of the Local Government Association, recently complained that local councils were being undermined in their losing battle against graffiti by lax anti-graffiti legislation. She complained that offenders under 18 are allowed three cautions in six months before they are even referred to a youth justice conference and that this system was a failure.

I guess this explains why only 100-odd people are actually charged with graffiti related offences in NSW each year.  

This is why my blog concentrates on worrying about cleaning stuff up, rather than worrying about dealing with the offenders.