I agree the word raid was the wrong word to use there
They don’t just find land and build a fence around it though in the modern era, that’s extremely reductionist. They pay for the privilege to work the land. Society as a whole agree the land is his because of this.
How do you parse how much belongs to the farmer and how much belongs to the community? I would argue we already have an arrangement like that. Who oversees this and what do they get out of if?
Most importantly where is the incentive to maximise yield if people are just growing personal crops? What if you want to eat but don’t want to work the land?