Did you noticed the capital letter at all??
I've said that there is NO DEFENSE against thieves and THAT should be fixed
Did i say anything about disabling stealing? NO! So be good boy and read carefully next time before you start saying random stuff okay?
Situation #1:
You're standing and looking on the ground infront of you and doing nothing (95% of time people doing that in NCR):
1) A thief moves his hands behind you.
2a) Move cursor to hex infront of you.
3a) Press left mouse button.
2b) Don't carry items in your inventory.
3b) Check inventory if he's planting dynamite to you.
4b) Disarm dynamite so you won't die (if you have enough HP).
2c) Carry something heavy in your hand slot.
3c) Just ignore him, he can't steal anything from you because you have nothing in inventory and can't plant, because you have full carry weight.
Situatuion #2:
You're trading with Sha Enin (or some other unpopular trader):
1) Someone in bluesuit moves hands behind you.
2a) Press "ESC".
3a) Move 1 hex infront of you (or to make >1 hex between you and bluesuiter)
4a) Continue trading with Sha Enin (or some other unpopular trader).
2b) Carry only 2 items for sale and put them in both hands.
3b) Start talk to Sha Enin (or some other unpopular trader) and wait till bluesuiter checks you.
4b) Check inventory if it's a dynamite, disarm it if it is.
5b) Observe Sha Enin's (or some other unpopular trader) inventory to plan trading.
6b) Move items to inventory, sell/exchange them.
2c) Trade anywhere but NCR.
2d) Walk from Vortis.
2e) Stop craft flamers lol, craft something better and in one slot, like ammo or powders, you'll know price and numbers, just keep it in hands and don't walk from bazaar, if only you'll go check Mira/doc/Dusty and then return to Sha Enin/Buster/iguana.