[xrd]

Is this not simply the same reason the Facebook API does not allow you to send messages to users: spam prevention?

I prefer G+ right now because it has a low spam ratio, unlike my Facebook feed, so if this is the reason for disallowing write access, I align with it.

[MsGemNicholls]

I understand the spam prevention idea, which is great that they are keeping some control.

All I'm doing it pointing out that keeping Google+ too closed is why countless articles and technology people are saying it is dead. It's dead because no one wants to share content on it, because Google are purposefully restricting the freedom to do so which people are used to.