Kai Saffron: I would say "No". Has actually made a few posts with written content, not just links. Also has partially filled-out profile info. High-volume photo posting usually merely indicates a highly unimaginative human poster, and not a Zombie. Zombies post commercial links, or the often-mentioned "Epic Pranks" or "Car Crash" video links to direct traffic to YouTube for commercial purposes.
mike smith: Yes, and it's not so bad with email notifications turned off. Perhaps they just +1 a lot - that puts a lot of stuff into shared streams.
Kai Saffron: All within their rights as G+ users. You won't see their shared plusses if you uncircle them. A lot of people hated that change to G+, and went on blocking rampages against everyone who didn't turn off their "share plusses" feature. I tend to try to avoid going straight into my Outraged Indignation Mode if I can help it. It seems silly to me what most people choose to get upset about on the internet. Getting mad so quickly just distracts them from seeing things that maybe are more deserving of their wrath.