I asked her directly last week and she said it was because a punter had posted private info about her in one of the feedbacks ... seemed reasonable but I didn't visit anyways
We hear this quite often. If it is a genuine reply, then the WG will do her utmost best, contact AW and have that line specific FB line removed. We have come across cases like these and then the FB is shown again, once AW have removed.
Also, if this is usually the case, the WG tends to put something about this in her profile, i.e. FB temporararily hidden for whatever reason, and that she has contacted AW and is waiting to have the FB with personal info removed.
Worst excuse I've heard a WG say was that FB was hidden as a default by AW and that she doesn't know how to change her settings so that it is displayed