When I say a system, I'm including everything, including the community. It's not any one part of HN, it's the way all the parts interact. Seemingly small changes can have a dramatic impact on the way the system operates, which includes the community. Suddenly different voices become amplified while others feel marginalized, and it's hard to predict if that will be a good outcome.

I'm not saying that it would for sure be a problem, but I sympathize with dang wanting to be very careful before introducing something like that.