We have on our site (Econ.SE) a user who appears to have been abusing the voting system: his/her account has no activity other than casting exactly enough up-votes to obtain the electorate badge. A look at the user's network account reveals that s/he in fact obtained this badge on at least three-dozen sites in the space of a few days (the only other user to obtain the badge on Econ.SE has been actively participating in the community since its inception over a year ago). I am therefore fairly convinced that this user is not sincerely voting on useful posts, but rather is indiscriminately voting on random posts—which undermines the ability of the voting mechanism to provide information to other users.
To deal with this issue on Econ.SE, I have gone with what seems to be the consensus at "Spam Voting" - Should we stop it?, and written a moderator's warning to the user in question.
Now I am wondering:
- Can/should I be doing anything to flag this problem to other communities that also appear to be affected?
- If the answer to 1. is "yes" then is there a better mechanism for doing this than creating a meta post on each of the large number of communities in question?