So... You get this lock, put it on a box, relog to an alt and get the items from the box?...or put this lock on a hotel room, come back 1h later just to find a empty room because someone got lucky?You think that the chance to brutforce a 4 number code is 1:10000? Think again (the key world is birthday paradox). I don't like it.
Let's be honest, this is for moving items to alts.If thats the goal, then why hide it? Just add a option to make a shared deposit box at FLC.
I think thi swas mentione already but it would make the lockpick skill a bit more interesting with not only basic lock difficulty=skill, but reward folks with master lockpicking status (300+) the ability to have awesome locks.