The NZTA says vandalism of mobile speed camera units puts road users at risk and is a criminal offence. Photo / NZTAThe NZTA says vandalism of mobile speed camera units puts road users at risk and is a criminal offence. Photo / NZTA

AA road safety spokesman Dylan Thomsen says there is always backlash when new enforcement methods are introduced.AA road safety spokesman Dylan Thomsen says there is always backlash when new enforcement methods are introduced.