I have ceased to do this. It felt like being a judge and atleast a couple of discussion posts I probably discouraged the poster more with a reasoned downvote than with a silent downvote. It brought to my attention that I didn't really have consistent, good or defensible way of voting. Not sure whether this expliciation would cause this to other users. My conception on what karma is and how it should be used has been mangled.

I am surprised that anyone from the internet can come and highjack the voting system to use as they see fit. I am putting the hammer down realising I didn't know what I was building.