I do not regret the loss of negative Karma, I do mind the loss of positive Karma. I miss being able to give positive karma when somebody makes me laugh, helps me out, helps someone else out... In fact, I made a habit of only giving positive karma, very rarely negative.
Whether or not you are nice, considerate or helpful to somebody has NOTHING to do with politics, and politics is only part of one small dirty back room area of our forums that we even hide from the public.
You will find that those who did spoil Karma for us participate only in political discussions here and contribute little to the community.