Should "retweeting" be a crime?

[GMDino]

Is stealing a crime?

In this story someone gave me two apples for my own personal use but I gave them away at my store.  

Oh wait, that's not stealing.

And this isn't "retweeting".

All seriousness aside there is a moral dilemma here.  Things told in private should remain there, IMHO, unless there is a chance of harm to someone.  i.e.: someone is talking about hurting themselves or others.  

I am currently in such a situation with knowledge about a situation that *perhaps* should be known by the public at large/media but is not yet.  My sources (multiple) are "second hand" but as solid as one can get given the story.  I chose not to say anything because my sources also tell me that this issue WILL be public, and soon, in a very interesting way.

If someone tells me private information and asks me to NOT share it I will not.

If I do can I be held responsible if THEIR reaction is to do harm to themselves (or others)?  If there was not hint of that happening when the information was shared I don't think so.  Not legally.  Morally it is wrong in my book though.  I would hope the person who posted the private exchanges is at least remorseful.