I had four downvotes today, all within a couple of hours of answers I posted within the last few days. It strikes me as odd that they would all gain any sort of attention suddenly within such a short period of time. It feels as though I'm being scrutinized by a single individual.
I understand from this answer that the system does have a way of identifying when one user is targeting another. So I'm glad to know I may not be paranoid.
I'm curious: What logic does it use to identify serial voting?