Originally Posted by khaight 
That seems exactly backwards. If I have a strong preference for one side over the other, and I work to support the side I like, and I lose, I'm not allowed to complain, but if I have a strong preference for one side and do nothing about it then I am?
Wait a minute. It implies that voting changes the outcome anytime.
So here something else:
the side you support is elected even as you did not vote: complain about what in this case?
The side you support is not elected even as you did not vote: complain about what in this case?
The side you support is not elected even as you did vote: complain about what?
The side you support is elected even as you did vote: complain about what?
It is when you do not vote you have a right to complain. Not when you vote.