Apparently, the woman lives in her own little world w/blinders on. If that were not the case, she would've noticed that Sheena is a service dog, that she was a person w/no handicap in the handicap stall and she also would have noticed signs posted about washing her hands, not that she should have to be reminded to be clean. She made the snide remark about a "dirty nasty dog" and she didn't even wash her hands! I doubt that she was following you; she probably was just going in the same direction as you and it may have appeared that way. Whatever the case, the incident was but a blip on the radar screen. And it made you see how good people can be, too, because more came to your and Sheena's defense. Flick her off your shoulder like the irritating little gnat that she is. FLICK!