Well in a way that is my point, when you vote +=0 it appears as though you are performing an operation on the node's reputation, but it doesn't actually do anything (I wonder what the code for this bit looks like).

And again I say, Null is not equal to zero. But there I go with the pedantry again.

Oh, and ++ for dissenting humour

I choose to believe that it is performing the +=0, but it's optimized out by the compiler. Don't ridicule my faith!