I am not speaking about a longer period, you could 'graduate' in a couple of days. Apart from that one could easily detect if such a corruption takes place. For

I am not speaking about a longer period, you could 'graduate' in a couple of days. Apart from that one could easily detect if such a corruption takes place. For example a story that gets not approved but gets enough points and is submitted by someone else could be evidence for such a corruption. The one who has not approved the story could get minus points.