Would Carbon-footprint Labels Work?

Short answer is no.

My purchases of electronic/electrical goods are based onthe following;

Quality

Reliability of the manufacturer, i.e. have their other products been up to the mark.

Fit for purpose

Power usage, some goods are better than others for a given product.

Price.

The moment the sales guy starts blathering on about global warming, carbon foot print, yada yada I just thank them for wasting my time and walk away...

I don't even thank them, when they start that. If I want to hear a green lecture, I'll go to a green church. And I haven't any idea if green churches even exist, since I've never bothered to look one up.

As far as I'm concerned, to date, there has not been one "green" manufacturer who wasn't in it for the higher prices he/she could charge. The lectures about the ecology are just lectures about economy with a couple of typos.

Labels? I look for power usage labels, or, if I need them, the pin out for the charger and the specific input voltage needed (when I have to find a one-off replacement charger for the device). Other than that, I look if I need operator instructions.

I would pay the same attention to the carbon footprint that I do to the rest of that kind of fluff - none.

So would I.

Shoot, so DO I.

It already exists, it's called Energy Star. It is slightly less important than the "Mobil Economy Run" from the '60's.