I think he means the fact that negative post ratings don't effect your position in the Top Posters
list. This was done deliberately because we want to reward good posts but we don't want to make people fear negative ratings. Negative ratings have always been a lot more debatable than positive ones, so we'd rather not make their consequences too harsh.
Of course is someone gets a huge amount of negative ratings we will take more drastic action than bumping them down charts.