I had that happen last weekend. Went in to Springfield Mall. Entered through JC Penney, and as I passed by the women's department, noticed two women about 4 feet away from me. One turned to the other and said "That woman's packing." I paid no attention (it was not directed at me, after all) and kept going.
Good thing my husband was on my left - and he carries on his left side - so they didn't see his 1911.