i don't see how the people living there can possibly get away with it since you and saks and fedex know where they live!
Yes, if you have an SA order them for you they will put in signature req. But when you order online, there is no option to do that. I talked to Saks.com and they told me it was their policy to "NOT" put signature required because people were never home to receive the packages. And if the FEDEX driver felt it was safe, he would leave it at the door. I got my bag about 4 days later so all ended well with me.Whenever I have had something shipped from NM or Saks they ALWAYS require a signature on packages over $3000. My SA will often ship in two packages so I don't have to be home to sign. I know my Fedex driver and we have a good place to put the packages so I don't have to worry about theft.
Be sure to talk to your SA when you are having items shipped. I think they can REQUIRE a signature on shipping if you want.
That said. I desperately hope they find your bag!