That would undermine whatever value the whole karma system may have at this point. Not punishing, or perhaps even rewarding mediocre posts seems likely to encourage complacency on behalf of the users.
A race to the bottom would likely ensue as well, since new negative achievements would become possible: who can get away with the most trolling? Who can get the most karma with the least effort?
In fact, I think the system, and most people, are far too lenient already, on the whole.
I wonder if posts shouldn't start out with a slight negative value from the outset, to reflect their high potential for introducing arbitrary complexity (noise) into the established information pool (mostly signal... though that may be up for debate) of the site.
Another idea: the more posts a user makes, the greater that initial negative value should be, to reflect the higher standard that is expected of them as time goes by. :-)
Yeah, that would require pretty complex algorithms.
I was recently thinking about the possibility that someone with a lot of influence might at some point try to damage LessWrong and the SIAI and what preemptive measures one could take to counter it.
If you believe that the SIAI does the most important work in the universe and if you believe that LessWrong serves the purpose of educating people to become more rational and subsequently understand the importance of trying to mitigate risks from AI, then you should care about public relations, you should try to communicate your honesty and well-intentioned motives as effectively as possible.
Public relations are very important because a good reputation is necessary to do the following:
An attack scenario
First one has to identify characteristics that could potentially be used to cast a damaging light on this community. Here the most obvious possibility seems to be to portray the SIAI, together with LessWrong, as a cult.
After some superficial examination an outsider might conclude the following about this community:
Most of this might sound wrong to the well-read LessWrong reader. But how would those points be received by mediocre rationalists who don't know what you know, especially if eloquently summarized by a famous and respected person?
Preemptive measures
How one might counter such conclusions:
So what do you think needs improvement and what would you do about it?