If I wanted to ensure that my land would never be used for a shopping mall or sports stadium, but I nevertheless wanted rid of the land, could I sell it in this almost ‘crowdfunded’ piecemeal manner and get my money, while also making the red tape involved in consolidating all of those 1-meter-squared chunks too costly to be worth doing?

Obviously no one would want a 1m piece of land, but maybe if they were doing it for activist reasons (like how the Cards Against Humanity people bought land to prevent Trump building his wall), or even as a novelty where they could buy it for their friend as a joke gift, it might be enticing. People could have annual parties where they go to their land and place a little deckchair on it and drink beers with their ‘neighbours’.