The reason for providing an Anonymous answering functionality is to prevent someone from tracing the answer back to you (perhaps to prevent a flame war or you getting fired or God knows what could happen). But if you give reasonable information in your anonymously written answer, which in combination with your badly configured Facebook profile, can be quite lethal to you.
Let us take this answer for an example. From the question and the answer, anyone can understand that the OP was a student at College of Engineering, Guindy, An ex-employee at Voltas and a current student at North Carolina State University.
The below mentioned Facebook Graph Search query seems to pick the right individual
People who studied at College of Engineering, Guindy and worked at Voltas and study at North Carolina State University
It is evident that people are not quite aware of their involuntary privacy leak through their Facebook profile, there is no reason why you have to make all these information about your grad school, previous employers; public. People may say, it helps their lost friends to get back in touch with them, which i agree, but at what cost?
Facebook Graph Search is a two edged sword that can be quite useful as it was to me when i used it to reunite with a family friend after nearly 14 years of no contact and also be equally dangerous as in the anonymous poster’s case!
ps: This post has nothing to do with my recent outrage against CEG. Infact, i agree with the OPs answer 🙂