Wow, nice post.  What it does not say is how to read those notes.  Since you said that Steemit uses the posting key to encrypt them, I decided to *guess* that I have to log out, then log back in with just the posting key, then go find my active key to send a response (send 0.001 steem).

With that unstated tid but, it works really well. 

Also: It cannot be stated enough that **nobody should be logging in with an owner private key** (master key).  That should be kept off line.