Police say social media sites warning motorists where police checkpoints are set up are treating road safety like a game, which could cost lives.
A Facebook page highlighting checkpoints and speed cameras has more than 60,000 people following it.
National manager of road policing Superintendent Carey Griffiths said such pages just encourage people to take a chance on drinking and driving, and eventually those people will go on and kill other innocent people.
Superintendent Griffiths said the police are not interesting in taking such sites down, because publicity surrounding them is counterproductive, and other similar pages just crop up afterwards.