Dev Question: Pre-Order + Bonus Items

For those unaware pre-order and bonus items. Are normal items that may be spawned through the '/bonus' command.

At one point these items were moddable. My curiosity like many others who use these items.

Why where they changed so that they can't be modded?

I just asked this for the umpteenth time on TGH so I'll add here aswell and agree with you, i want to mod my /bonus weapons... You spent time giving us great skins for them ANet only to make them useless to us as we can't mod them