Well... they can come up with all the stupid reasons they like but it's all useless and untrue!
This stupid habit passed on thru many generations has caused more CO2 output and Engine Damage more than we all can realize.
Not only is it bad for the environment, it's also critically bad for the engine.
Revving it high then shutting it off right away will put more fuel into the Combustion Chambers, causing it to be cleaned off from your very crucial lubrication. Since you shut it off, the tendency of the chamber is to suck more fuel and not burning it, therefore making the cylinder walls bare metal in contact with the piston rings bare metal also. The next time you start your engine, this cylinder condition becomes a harsh and abrasive environment. If you do this everyday... then you are scratching the cylinder walls 365 X in a year! The effect; shorter engine life... Frequent Engine Overhauls, Higher Fuel Consumption and Higher CO2 output. Not to mention the Bad Effects to our respiratory health. Unburned or incomplete burning of fossil fuel is the culprit to our Carbon Footprints.
Since we can't stop the majority of people from doing this... we can protect and augment all the bad effects of this very bad practice. With the Green Tech Program and GTO (Green Technology Oil), the walls of our cylinders will always be protected no matter what. Instant Early Morning start up becomes the norms and the drivers will feel that they no longer need to do this unnecessary revving anymore. It helps to know. :-)