It doesn't have anything to do with karma. From a throwaway account, I have no basis to know who you are based on your other participation. HN is a community. Pseudonymity is fine, but anonymity is counter to the idea of community. I encourage you to establish yourself and be part of it.
Here's an article that reviews the literature on diluted bleach rinsing: http://www.rdhmag.com/articles/print/volume-35/issue-6/colum...