title: private write and public read in gundb
body: <p>I want to create a <code>microblog</code> where everyone can read all posts, but just owner can delete or edit the posts. In <code>gundb</code> without sea everyone can edit or delete posts, in <code>sea( gun.user())</code> I have to share public key, in sea how I get all user's post and show posts in timeline? </p>
  
  <p>How could I create this with gundb?</p>