I know that but a lot of people will just post meaningless crap too like "i had a great day today" or "hi how is everyone" all the time just to up their post count. I wonder if the old reputation system could be used without the chip system, ask NDN about it. Basically where reputable posters got rep points from the mods. That could be another level of security perhaps. But yeah there is still potential for spam any way you go. It's hard to control and I commend you for trying