Could you give more details what's wrong?
"Be civil. Don't say things you wouldn't say in a face to face conversation.
"When disagreeing, please reply to the argument instead of calling names. E.g. 'That is an idiotic thing to say; 1 + 1 is 2, not 3' can be shortened to '1 + 1 is 2, not 3.'"
How do you mod a comment down, anyway?
Here's an idea: Don't allow people to up-vote on ANYTHING (stories or comments) until they get a karma of 25.
From a practical point of view I tend to favor the first.
edit: or me, whatever floats your boat.
-9 != -10
-11 != -10