This is why PG has to have logic in the HN code to detect and punish or lock out voting rings. The Sybil attack [1] is well-known and there are methods to dete

This is why PG has to have logic in the HN code to detect and punish or lock out voting rings. The Sybil attack [1] is well-known and there are methods to detect it. Harder is when a circle of genuine users all decide to watch each others' posts and upvote them purely on reputation. [1] http://en.wikipedia.org/wiki/Sybil_attack http://en.wikipedia.org/wiki/Sybil_attack