Red light and speed cameras are being fooled by Sprayonmud, an automotive spray originally designed for urban SUV drivers. "Sprayonmud is a specially formulated spray-on product for anyone that wants to give friends, neighbours, colleagues or just anyone at all, the impression that they have been off-road or, at the very least, out in the country for the weekend," according to the company's website.

Although using any spray to partially obscure one's license plate can carry a significant fine, many have discovered that such measures can reduce the chance of increased insurance premiums by of avoiding license demerit points from camera tickets. Most countries and US states do not assign points for obscured plate violations. The bottled dirt sells for $14.40.

"(The spray) is an inevitable response to bonkers and counterproductive speed enforcement," said Paul Smith, an anti-speed-camera campaigner with the Safe Speed group who claims to have conducted more than 8,000 hours of research into speeding. "I think that the average copper would be mildly amused."