I have recently been downvoted on three different SE sites in a short period of time. All of the posts had high visibility on my profile (my top answers/questions or my recent ones).

It's probably just a coincidence, but it made me wonder whether the serial downvoting detection mechanism takes multiple sites into consideration.

I read the faq, but this specific issue doesn't seem to be mentioned.

In case it does not, then I think it needs to be detected and removed. It's fairly easy to target a user active on multiple sites and get away with it- it shouldn't be.

  • 6
    I doubt it does. Nov 17, 2013 at 22:52
  • Doing it would require cooperation between all SE sites, which I do not think takes place (for now). Nov 17, 2013 at 23:04
  • 2
    @FredericHamidi accounts are linked across multiple sites though, so I believe users activities can be tracked. Nov 17, 2013 at 23:07
  • 1
    @Gabriele, serial voting detection would require tracking both the sources and the targets of the votes across multiple sites, which is exponentially more costly than tracking a single user. Nov 17, 2013 at 23:09
  • @FredericHamidi yes I agree on that. Nov 17, 2013 at 23:10
  • 6
    The impact of serial downvoting across sites is less than the impact of serial downvoting on one site. If the serial voting isn't enough to trigger on each site, you're only losing 2-6 rep. Also, the perpetrator must have at least 125 rep on all of these sites. While I agree that this would be a nice feature, I don't think it's a terribly necessary one.
    – user206222
    Nov 17, 2013 at 23:50
  • 3
    Rep is not necessarily the main concern, @Emrakul. Revenge downvotes can distort a post's score unreasonably.
    – jscs
    Nov 18, 2013 at 1:50
  • @Josh I guess I just don't think that's a significant problem.
    – user206222
    Nov 18, 2013 at 2:16
  • 1
    You're right, @Emrakul, it's probably not significant enough to do cross-site detection. It's just annoying.
    – jscs
    Nov 18, 2013 at 2:58


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