Thing is that everyone have things to hide.
I think there should be extensive list of what you have to hide and reasons why.<p>I would start with two:<p>-salary : thieves, kidnappers (do you really trust that everyone in law enforcement is trustworthy they can cooperate with thieves)<p>check your contract, you might get even fired because you leaked your salary, and it is your duty to keep it secret and explaining that some hacker did that does not matter<p>-contacts : maybe someone will be stalking your friend and he might get access to your friend because you were hacked. You also should not share your friends mails and numbers without their consent.<p>They might be at least angry at you because you shared their contact info.
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Maybe you guys have better or more ideas.<p>But nothing to hide applies to hermit on top of the mountain. 
If someone thinks otherwise he is an as<i></i>*le because he does not think about people around him.