I and my party were running around Vin Tomb when I saw this party. They all looked exactly alike, they had VERY similar names, and their movements were even synced. We tried talking to them, but they didn't reply. I said I think they're bots, so we decided to start KSing them to see if they'd do anything, or stop, or keep fighting. We started fighting what they were, and they kept fighting. We did it again, and again, and again. No reaction. So we decided to pull something before they got to it. They'd still go after it. So yeah, we believe they were bots lol.
That's the only time I've ever intentionally KS'd someone. And if they're bots, I don't feel bad ;p