[Margaret Pilkington]

If you go to your profile page, the Karma that you have received will be under the threads you are currently subscribed to.......Red is negative, grey means the person who gave it hasn't built up much rep yet, green is the stuff that boost your own rep.

I do not give Karma to get it back from the person I gave it to....I give it if and when I feel that the poster has made a point that is interesting/valid/or in line with what I think about the subject myself.

I have only give 8 'portions' of negative Karma in seven years of being a member.
I never give the red stuff unless the poster really warrants it(and I usually think it over before giving it).......never for just a difference of opinion......more often for posts that are unreadable due to bad english.
I like Karma to be signed(personal taste), but only so that I can acknowledge it with thanks to the person who gave it to me