[Dylan16807]

> Only because they're idiots.

Even if we ignore the "heard bad advice" versus "idiot" issue, that's still untrue because there are other reasons besides what's best for the machine.

Maybe they aren't in the car, and they're warming it up to be comfortable.

Maybe there is ice on the car they need to melt.

[Gordonjcp]

Use deicing spray to get the ice off the car. If it's too cold for you in the car, then just sack up and get on with it. You're not going to come to any harm being a wee bit cold for a couple of minutes, and the heater will actually start working quicker if you drive. If the weather is as cold as it gets here in Scotland in winter, the car will *never* warm up sitting idling.

[Dylan16807]

So I'm an idiot if I avoid things that are unpleasant but won't harm me? And again, speed doesn't matter if I'm not in the car.

Or I'm an idiot if I would rather idle than pour alcohol on my windshield?

> If the weather is as cold as it gets here in Scotland in winter, the car will never warm up sitting idling.

Okay, then that person is an idiot, but it doesn't extend to the people actually warming up their car.