SC,  She comes to work, thru the public, is at work with workers (What if she deals with the public at work?) and leaves after work thru the public.  I'm not sure we can escape the public.  Dress codes are always problematic so if one isn't in violation of it, no need to deal with it.  On the other hand taking photos at work could have nothing to with individual privacy and is all about security and proprietary information.  So taking a picture of how one is dressed revolves all around if that person is in a zone of "reasonable level of privacy."  Then we would have to settle on whether taking a picture exceeds that reasonable level of privacy.  I think at some point the person has to have an awareness of how they are dressed and the limitations of their dressing.  If you are going to wear a short skirt and you know you are going to bend over (job required or job accidentally) and you don't want anyone to look, then why wear it?