The new moveable rear system is the "most stupid idea" formula one chiefs have ever implemented.
That is the typically blunt view of triple world champion Niki Lauda, after the officially-titled DRS (drag reduction system) made its debut last weekend in Australia.
"Overtaking is something that should be decided by the drivers, not by the FIA flashing green lights in the cockpit telling them to fold their wings up or down," the great Austrian told Sport1.
According to Auto Motor und Sport, the system was a relative failure in Melbourne, given that more passing moves occurred without the help of DRS.
Asked if he thinks the system will ultimately be tweaked or scrapped, the 62-year-old answered: "That I don't know.
"I would have never introduced it. It's definitely the most stupid idea ever conceived," added Lauda.