It would be good that if a house (in the wilderness) is abandoned for a long time (90 days? 150 days? from the last login date of the owner) players can mine (or just take) resources (blocks) from the house.
It doesn't need to be too easy, only top blocks, and not a whole house, just a few blocks every day become 'available' starting from the day the house is declared 'abandoned'.
I think players should be able to get the blocks but the blocks would go to the player who placed them down's inventory.That is like getting free plat items.