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Re:A proposal for improving HN : it should cost a user Karma... by kaybe on Saturday September 08, 2012 @08:59AM (#4492866)
But then it's nice to know you're at least talking to the same person over several comments. In 4chan you never really know, because anyone can claim to be op or to have written any other comment.
Re:A proposal for improving HN : it should cost a user Karma... by Karunamon on Saturday September 08, 2012 @10:12AM (#4492951)
Poster ID's. A hash that's created based on your IP address and a seed that changes daily and per thread.

It stops people from claiming to be someone they're not, but I see your point about knowing who you're talking to.