The idea is pretty straight forward and its that when a player breaks a block instead of the entity dropping into the void or maybe to trade it goes straight into your invetory This will mainly help with dirt and sand trade going down a bit, Losing illegal items to the void ( even with /lnf it sometimes doesn't work)
This can help if someone is with a friend at there island and there friend picks up the dirt or sand someone just mined and won't give it back. But would also make it easier for island farmers and they won't lose as much dirt to the void than they do. Neutral