Nice ideas here, I just wanted to put in my two cents.
Most locks will be pickable, and (as posted many times before) will vary in pickable-ness (yes, that\'s a word) depending on the price of the lock (chest/door). The very good locks, player-made only with lockpicking and forging skill as Kravius posted, could be also opened in a difficult much time-taking proces: The thief will first need a wax-print of the lock. Working together with a smith willing to do this action, he can make a key-mould, for that specific lock. Once the key is made (maybe out of copper or some other weak metal, one time use) he could open up that chest... Of course, you might say that this won\'t be fair for the robbed ones, but keep in mind only the best thieves working together with one of the best smiths that are willing to do this (when noticed, this will surely ruin their repuation, getting less customers, encouraged by the one that was robbed, you know, making leaflets and such \"Do not buy your weapons at Loran\'s smithy, for he is a raging lunatic that helps thieves!\" that kind of things...). And that very rich player that spend his trias on the custom lock will probably hire npc-guards to protect his home (/private palace), if there will be any, that is. Hireable npc\'s would be another nice feature, in distant future of course. Combining guards and the custom lock, the thief will have a very hard time stealing the treasure, and has a high risk on being caught (for the sake of the players that will be robbed), but, when he has enough experience in sneaking, breaking in and wax-print-making (
) he might succeed, and sharing his loot with the ones who helped him, this riskfull action will be rewarding. The wax-mould will be lost, as well as the key, so this won\'t be repeated (probably). The victim will also invest in more bank-space I suppose.
Concerning the fact of pick-pocketing, I\'d say (as many others) the inventory will be split in several parts. There will be the normal inventory (that we all know), and an inventory like a small chest (but I actually can\'t imagine someone carriing chests around, but who cares when you can carry 10 swords and 5 shields anyway) or a purse. Unskilled thieves will only get to pilfer to normal inventory. The skilled ones could, when having a pick-pocketing knife, cut the purse of the victim\'s belt and take home the loot. As said before, the purse as well as any stolen items could be flagged for a certain time (let\'s say one day), and when recovered within that day, the victim will just take home his items. When too late, the items will count as the thieves\' ones, so he\'ll probably need to send a thief to loot the actual thief :]