[WalterBright]

It happens to me, sometimes. It doesn't work very well because I couldn't care less about my karma points.

[Razengan]

It makes your comment [nearly] invisible to others, unless they have showdead. It can also limit the rate at which you can post. It achieves what spam-downvoters want, without any downsides to them.

[WalterBright]

I should probably post less often, so not a problem :-)