In this case it was a council-owned dirt road between two unfenced properties. By moving his property onto the road and erecting a pergola on the road, the path of the road moved onto our property, which he then claimed was the true location of the road. Then he pulled up fruit trees that were planted at the front of our property (for privacy) because now it seemed like they were planted on the strip, which is supposed to be empty. In truth, those fruit trees made it obvious that he had moved the road and that's why he wanted to pull them up.

The 'neutral strip' that they auctioned off, was actually the very tippy end of the road (which they can do, unless it hinders someones driveway access), and we lost access to our second driveway, which is entirely illegal except there's a whole bunch of legal nonsense you have to submit to keep a driveway valid after it becomes blocked for a certain period of time, otherwise the driveway is automatically considered cancelled (in this case, his pergola blocked it for long enough that you need a new driveway permit if you can believe it). A new driveway permit can not be approved if the driveway can not be accessed, and so the fun begins. To make the driveway valid, and hence the sale of the land under the pergola illegal, they made it seem like we needed to forfeit the strip to general access...

I'm not even being sarcastic when I say that surveying property borders, roads and driveways seems like a perfect application for an immutable and easily auditable blockchain based on lat/lon.