Forgive me if I'm wrong...
...but computers have not yet achieved sentience, so anything written on the web orginated from a real* person. Maybe not someone who Google ranks highly, but I don't really want a large US corporation telling me who to belive.
Yes, there's a spam problem, but the spammers are real people and will work at gaming the Google+ system anyway.
* Imaginary people generally strugle to use keyboards.