Lets elaborate the "lootbag" idea (of course, "lootbag" being just the codename for these things):
* There should be different types of lootbags, giving different types of bonuses.
* Only things stored in lootbags can be taken.
* Quest items may not be stored in these containers.
* Ultimativly, lootbags should be craftable and quality being the factor determining, how hard it is to get into it.
* A lootbag should have a distinct appearance, so nobody puts things accidently in it (suggestion: Like a glyphbag, just red).
* The description of a lootbag must clearly state, that it will give some kind of a bonus, but it is subject to pickpocketing.
* If somebody has a lootbag, his/her playerinfo will display some info about it in the same style, playerstrength is estimated. A higher level in pickpocketing allows for better estimation. A higher purse quality defends against estimation.
Suggestions for bags:
Name: Fancy purse
Description: A purse prominently displayed to show personal wealth and impress other people. The nature of this item however also attracts thieves.
Bonus: Proportionally increase charisma by the amount of wealth contained within
Name: Bag of holding
Description: A magical bag, that somehow makes it's contents weight a little bit less. The enchantment however is powered by the crystal, requiring it to be worn openly, which makes it subject ot pickpocketing.
Bonus: Items in this container weight 25% less (I'd really love to see a masterpickpocket looting this baby for 300kg worth of ulbernaut claws).
Name: Crystal encrusted purse
Description: A purse, that draws energy from the crystal, boosting magic. The nature of this purse requires it to be carried openly, where it is sbject to pickpocketing.
Bonus: Increase crystal way proportional to contained value.
Name: Snapper Sack
Description: A booby trapped sack, often worn by law enforces to bait thieves. The nature of this bag requires it to be worn openly, though it's contents may be stolen.
Bonus: Increases the owners chances to detect pickpocket attempts.