The sensitivity is merely a measure of my newness to LW.

Don't sweat it. I don't think much of this nonsense "karma" thing. It's a total joke but makes sense only for those who regard the "wisdom" of the mass as somehow reflective of a post's quality. A post should be judged according to its merits, not the "points" accorded to it by (anonymous) persons who can't provide a justification for their vote.