@Agbe, I think it was clearly stated that such a feature would be anonymous in the sense that the negative karma would still remain anonymous, but there would be an option to explain to the one who received it why he received it. If someone does something bad and you punish him without him even understanding why he is being punished, it is very likely that he will do the same thing again.
Punishments make sense if the one who is punished has the opportunity to try to correct what he is doing wrong.