What is to prevent the same user having two accounts that "vote each other up"?.

  • 3
    related: meta.stackexchange.com/questions/35989/… Oct 7, 2010 at 23:15
  • -1 for bumping the question with a useless edit.
    – Arjan
    Oct 10, 2010 at 9:32
  • Oh well, maybe that edit was not on purpose; I removed my downvote. Still: know that folks are watching you, and any sock puppet you create.
    – Arjan
    Oct 10, 2010 at 9:33
  • @Arjan: my mistake, the edit was done by me...downvote if you like...sorry about that!
    – studiohack
    Oct 10, 2010 at 14:21
  • @studio, did you just add the very same comment again, and then delete that? I just got notified for it!
    – Arjan
    Apr 13, 2011 at 10:57
  • @Arjan: no! I have not been on this question for a long time!
    – studiohack
    Apr 13, 2011 at 15:13
  • Hmmm, @studio, I guess anyone could have posted the same comment and then deleted that, given Deleted comments persist in the global inbox, just to play a trick on me! I guess I'll never know... (If any developer sees this: according to meta.stackoverflow.com/inbox the comment id is 215105, different from the original comment above.)
    – Arjan
    Apr 13, 2011 at 15:51

1 Answer 1


There are script that runs each day that can detect such scenario and reverse all the vote if a such thing is detected.

The detail of the those detection script are unknown (except for the developer) for obvious reason.

Also, if you think someone has been doing that (and the vote haven't been reversed), you can flag it for moderator attention.

  • 2
    *except for the developer :-)
    – TheLQ
    Oct 8, 2010 at 2:43
  • 6
    Now I know why Jeff has such a high rep! ;)
    – abel
    Oct 8, 2010 at 13:24
  • Security through obscurity, I feel safer already. :-)
    – dalle
    Oct 10, 2010 at 6:38
  • @dalle, how is this related to security?
    – Arjan
    Oct 10, 2010 at 9:39
  • 1
    @Arjan: Flaw in algorithm leads to mischief sock puppet getting much reputation which in turn gives knowingly incorrect answers to questions (that people trusts because of sock puppets high reputation) which opens up for potential attacks? Conspiracy theory? Yes, perhaps.
    – dalle
    Oct 10, 2010 at 10:47
  • @dalle If you know the algorythm, it's a lot easier to go around it, then if you have to guess what it is and you are also more likely to get caught.
    – HoLyVieR
    Oct 10, 2010 at 13:50

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