Analogy avec car is charging the 7 yr old from across the street for a lock for your garage after you caught him going into your unlocked garage and turning over all the old paint tins on your car because the other kids on the block told him that there are cute pixies in them. Further analogy is then to say to his parents that you are now going to look after him from now on so that you can make sure he is punished daily instead of just giving the parents from across the street a mouthful about bringing up their kids properly and asking them for the cost of a re-spray for your car.

As explained above, its a MAT OF HAIR, not a grid of hair. The grid you are referring to is a grid of wires connecting drawing pin (us: thumbtack) contacts pushed into the mat. 1/2kg (sorry: ~1lb) of hair is being used, not 2 microgrammes.

A video of the guys presenting their invention to some OLG (official looking geezers) can be found here: http://blog.xnepali.com/electricity-from-hair-in-nepal-hair-solar-panel/

If you read 1.) TFA and 2.) The follow up comments (yes there are other forums than ./ ) you'll read the comment from Nepal that the whole of the back of the device is a mat of hair held in place by sellotape under a pane of glass. The strands you are seeing between the thumbtack posts are wires not hair. If the device is 0.5m x 0.5m then you've got 0.25m square converting solar energy, not to mention the increase in surface area due to texture.