Honestly, I think the vast majority of facebook's privacy guffaws have been due to incompetence and not malice. My concern, however, is that we get in the habit of excusing these failures because of this incompetence.

Software can be made (more) secure and can be tested (better). The point then is when does it make financial sense for facebook to put the money and man power into tackling these issues on the front end... If users / consumers don't take note of the problems and move to another (currently nonexistent) platform facebook will never have a motivating reason to change.

Perhaps, users have done this to themselves by demanding low cost (free) software with fast release schedules for new features.