Negativity and Polarity

[Lighthead]

There was a lot of talk about karma in this thread. Don't almost all of us do something at some point in our lives that karmically tie us to this planet? I mean, a lot of us have done some really shitty stuff as teenagers. I keenly remember bullying some "nerds" when I was in high school. And the only reason I did that is because I was bullied for being a nerd in elementary school. Ever since reading the LOO material I think about those instances and it brings me shame. It brings me shame in the sense that I constantly think about that when thinking about my past deeds. Don't all of us do something really shitty to others at some point in our lives? Or is that just a normal process of incarnating here?