The karma system is flawed big time. Theres nothing to stop someone from making multiple accounts and -karma point spamming someone. I seem to have run into such a person purly by chance.
I was +karma until i declined this persons friend request then magically started to gradually reduce every couple of days between 10-20 karma points when i was about +27 to begin with.
I told said person the truth i genuinely thought the person had a disturbing taste in death and genuinely found him to be an odd person needless to say... i moved not long after i was talking to the person online (not because of him i did not know him irl i just had to move shortly) and internet and tv are the first bills to go when you can't afford certain things.
Any who long story short almost 6 months later i got internet again and im magically -123 karma points currently when i haven't even been logged into the site or online for that matter in the past near 6 months... and am currently a certified troll which you get when you hit -100 points and can not post anything on the web site.