Bullshit.Remember when connected to Target wifi, AP can view what websites you access and the "name" of the phone. And the "model" of the phone. For example if you have a iPhone...target can see that "Evan's iPhone 5" acesssed these websites. So if you don't want target to know what websites you access change your phones name.
Certainly from a IT standpoint Target can view that info if they wanted to, but AP doesn't have access to it let alone the time to mess around with it.