I'd prefer a ratio over any other metric. Amassing points tends to become an achievement to some. Directly relate the number to the quality of their links and people stay focused on good content.
I completely agree. I think a ratio is a good compromise for judging someones reputation at a glance without necessarily creating a 'high score' mentality. Maybe even having a ratio correlate with a three or five tier system? Red yellow green or something similar?
Be nice. Or else.
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