If you have an arty on you and it isn't insured you deserve to lose it to a thief. This whole yellow bag protocol is rediculous IMO. Thieves have been nerfed enough and when people make/play a thief character it is to be a thorn in other players sides. If you can't take the necessary steps to prevent something from disappearing from your pack then it isn't the thieves fault. He is only taking advantage of your laxness. Thieves understand there is a possibility (more likely will be) that they will be killed when they are caught staealing. Enough of this boohooing about thieves and them stealing from your pack. Get over it and get on with enjoying the game. I use the rule if someone walks near me I move away from them. If you can't do this then it is on you.