Ban Lifted. Due to him taking back his own blocks.
This basically saying its okay to build a wall (regardless of size, could be like 100 blocks tall) for someone, then days later change your mind and taking it away, completely ruining the structure.
Also if you argue that it's their block and not the lot owners, you are basically saying it's okay to provide 50 stacks of wood, letting them build a house with it, then going and destroying the house to get your wood back.
Niether of these two situations are okay.