Yesterday, 2:15 PM · 365 replies and 6180 views.
I actually see it the opposite way - if you vote, don't complain. If you vote for Labour but get the Tories, you're complaining that you lost. If you don't vote, but complain about the political direction of the government, you have a right to complain because you asked for neither them nor the system they operate by.
In any case, people have a right to complain whether or not they vote. Voting is just one single and quite small part of what democracy should be. I think inflating the importance of voting diminishes the importance of protesting, speaking out, and other sorts of activism. Voting is becoming synonymous with freedom, and they really aren't the same thing.
For the record, I never vote and never will while first past the post exists. The Birkenhead ward is Labours safest seat, and all votes here are wasted.
Churchill, but he was quoting someone else.