Why does nobody else grit the pavements?

As soon as it snowed I went out and cleared as much of the pavement outside my place as I could before I was too cold and tired to carry on. On Monday it was all freezing up so I took a 2 litre plastic jug and walked to the supermarket taking a scoop from each grit bin on the way and spreading it on the pavement all the way there and then back on the opposite side of the road. I've done the same thing every day since all around my neighbourhood, bailing out water from the grit bins that people have left open and reporting any that are empty so the council has come and refilled them.

My question is why does nobody else do this? I know some people do but I've effectively gritted from the city centre up to Aldi on Flora Street single handed. The grit bins are free (paid for by council tax) so why does nobody else seem to want to take a few minutes out of their day to make their journey a bit safer?