Jack, I think you can just share a message with one person. IDK about a wall.
only strange thing about Google+ is the lack of a "wall" to post on and the absence of being able to send someone a direct message within G+. Why were these seemingly basic features left out?
it is possible to share with one person, but the lack of an "inbox" such as in the social networks that came before is just an interesting concept.
If you tag someone and limit it to where only that person can see the message, there is no reason for an inbox.
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