Bin Bags

I happened to be at home when the bin men came round last week. They were giving out this years allocation of the purple bags for non-recyleable rubbish.
That's three rolls of bags per household.
I still have about half a roll left in my cupboard, which should last me another year, so I said thanks, but I only wanted one.
"But it's your allocation!" he said, trying to make me take them.
"But I will never use them," I said. "What's the point of filling up my cupboard with plastic bags I will never use? And next year you'll bring me another three...." I still have a roll and a half of black bags from before the system changed - which I have no use for either.
"You'll have spare ones for people who need more," I said, and eventually persuaded him to take the unwanted bags away. It did make me wonder how many more unwanted rolls of bags are out there, cluttering up people's kitchen cupboards.