I recently noticed (and reported in meta.japanese.stackexchange.com) a pattern of systematic downvoting by one user against all my questions and answers.
I have honestly no idea what the user's reasons or motivations are, since we have not interacted at all, barely even crossed path on the site (both answered the same question once), but he is clearly targeting me, not my content (which there is no physical way he could have read entirely during his downvoting sprees). He has not left a single comment on any post to justify his downvotes, nor has he replied to my polite requests to explain himself and/or stop this.
His first wave of downvotes was automatically reversed by the system yesterday, and I would have left it at that... But he has been at it again today, and just seems to have no other activity than downvoting my every contributions, which is getting a bit old, to be honest. This really isn't about the reputation points (which get returned each time by the system anyway), but I think a verbal notice enjoining him to play nicer with the community could go some way...
Because this particular form of abuse only has to do with votes, not post content, I don't think there is any way to flag him within the site (?). Also, because our site is still pretty young, it appears we do not have any moderators yet (pro tempore or otherwise)... Would any meta-SO moderators mind taking a look at it?
Edit: somehow missed this similar question when posting mine. Though I do not know what the policy for redundancy is, with support-requests... Please if necessary, feel free to close this question and I'll happily repost over there.