I used to have a 5 digit one as well, but I was also a cool script kiddie and when someone told me about the dir traversal in the icq web server that was enabled for everyone by default, I went on an icq config stealing spree. I stole a password for a number that was like 12121 or something neat like that.

It turned out to belong to either an icq employee or a friend of one. Needless to say I found that I could no longer log in to any of my stolen and personal accounts.

And that's my story about finding out what karma was in my teens.

I have a three digit Slashdot number, years after it mattered a whole bunch :)