I tried to put a lock sign over a chest in the Wasteland but it said I did not have permission. I thought the purpose of those lock signs (1000 rupees each) was for locking things outside of town. What did I do wrong?
Wastelands are reset periodically. Like the entire world is deleted. So, locking chests has been disabled to discourage keeping valuables and other stuff out there, rather keep it in town or a locked chest in the Frontier
Well no, but only you can see what the items that you put in there. Everyone's inventory in an enderchest is special to each player.