G+ spam would probably be closer to blog spam than email spam. It'd be hard to get any noticeable volume of direct spam going from a single account given the as

G+ spam would probably be closer to blog spam than email spam. It'd be hard to get any noticeable volume of direct spam going from a single account given the asymmetric circle relations. But spam postings would still be useful for e.g. black hat SEO, or for making a Google account look more valid for the purposes of abusing other Google services.