Stealing is a useless skill right now. Even at 300%+pickpocket perk, you get cought very often, you can steal minigun after minigun, and than you get cought on stealing a stimpack. Karma -1600 and you're out of town. It is useless pretty much, mainly due to karma system now.
Beside, all you need to do to avoide being stolen form ... is move away, that easy. It's funny when people whine, because they can't pay attention to their chars.