The following CSO Online story raises interesting questions about Ethics and security.
The Facebook perspective is that Users need to be responsible for their own settings, even though managing settings is not intuitive and is difficult to find. Security experts suggest the Facebook should do more for training and educating users.
On-line users are known for not using training materials. So, how will they learn?
Facebook derive their advertising value from the carelessness of the users.
Lots of very interesting ethical and security questions.