Given that it took about fifteen minutes for the giants to actually kill her, I don't think I want to risk her ever being hostile to me due to my lawbreaking ways.
On a related note, that weapon rack you see in the inside of Warmaiden's? Directly part of the wall; you can't steal the weapons mounted on them.
I've also cleaned out Belethor and Arcadia. Belethor actually caught me but didn't see me take anything, and I got out before he called the guards.
Though his sarcastically snide "Do come back..." line made me seriously consider offing him. Lucian is a better general goodsman anyway.
Oh, and about Arcadia's shop...
I'm taking a break from robbing the entire city of Whiterun blind though as I go to the mage college and learn to be more awesome at not-Illusion spells. I plan on hitting all five of the professional guild/colleges/whatever the Companions are considered this time around.