The continuing incidence of injuries to motorists and their passengers caused by rocks thrown at their vehicles is a most dangerous and disturbing trend which must be curbed by the Iemma Labor Government, Shadow Attorney General Greg Smith SC said today.

"Current laws don't specifically cover this type of crazy delinquency and new laws and punishments which discourage this behaviour are urgently needed," Mr Smith said.

"The Iemma Government's inaction to date has sent a message to delinquents in the community that there is little chance of detection, and even if caught, the punishments will be slight," he said.

"In a recent well publicised case, a charge of negligently causing grievous bodily harm has been laid, which carries a maximum sentence of 2 years imprisonment, a trivial punishment for such dangerous behaviour."

"In my view a specific offence similar to the South Australian provision, but with a far greater maximum penalty, say 25 years imprisonment, should be enacted urgently."

"Persons charged with this new offence should be subject to a presumption against bail."

"I agree with my colleague, Shadow Minister for Police Mike Gallacher that there also needs to be a massive education and advertising program to persuade members of the community who may be tempted to throw rocks at vehicles that it is most dangerous and often causes loss of life or severe injury to the victims."

"We must use all our energies to stop this dangerous behaviour, which threatens all of us and our loved ones."

"Enacting specific legislation with sufficient deterrent penalties targeting those who throw objects at vehicles will send a clear message," Mr Smith said.