privacy must be respected, and actually should be enforced by everybody, including you. meaning: even if you know him, you should pretend that he is anonymous person, disconnecting the _why persona from the real-life person.
for example, if you know him, and you hire him, you still should ignore the on-line _why persona, because for privacy purposes, it is separate, anonymous entity, and you should not connect it to real person. that's what privacy should be.