The last time I really checked (which was back in the early days), you had a far higher than normal proportion of posts with negative karma, which is the main thing that I use to evaluate a poster's status. In general I find total karma to be unreliable because karma seems generally linked to post count (in the old days, this link was quite direct).

Back when there was no limit to the number of downvotes one account could make, someone - either several people or one person with multiple accoutns - went through his comment history and systematically downvoted every post. (I inferred this at the time from the fact that the number of downvotes - particularly for out-of-the-way replies and meta stuff - was too consistent. And possibly other evidence I don't recall, which would've come from noticing large shifts in karma at once.)