Helps find people benefiting from sock puppet or "Admirer" upvotes.
For a particular tag get the Avg and StDev of score - suspicious scores
are likely to have * BOTH HIGH AVERAGE AND LOW STD DEV * of
score (e.g. they routinely upvote each of their own posts x times).
To filter out noise look for > 10 posts and high average
as persistent cheaters are likely to be... persistent!
*** NOT AN ABSOLUTE TEST *** - human needs to read some posts and verify.
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