The feedback thing is an old trick.
Create a profile with one girl, get some feedback, when she moves on swap the pictures, new girl has apparent good feeback even though she may be a total newbie. The other give away is the profile says 'new in town' yet FB goes back to August. It's also why you should regularly monitor girls on your hot list and have a few profile notes about them.
As Cool Tiger says, include the profile name in the feedback, which alerts to changes of name. If they hide their feedback, most of us wont see them.
Why do pimps think punters are stupid?