Since you need to be in direct contact with the items needed to craft there is a big time loose in the process.
People do apreciate their time and crafting time its a sink of time(soz) and distribution.
Why not accelerating this by having direct contact with all your stuff? Database could be answering with the whole amount of items owned in the claimed area, avoiding the possibility of using it by a "common sense" distance to avoid mechanical abuses while beeing raided.
This could reduce the amount of time spended transporting items after crafting, harvesting or foraging and giving more time to the people to focus on other things like rising a pvp char and so.
This could lead to people abandoning walls easily once they can focus on rising pvp chars.
Everybody likes crafting, but this means lot of less time outside in the actual system.
This needs more thinking, of course.