You are giving consent when you vote. You are saying this choice is fine.
Actually, when you vote, you just vote.
That's it. It's not a magic ritual, you don't telepathically send your message to the Holy Ghost of Democracy when you vote, Anubis isn't going to weigh your ballot against a feather before deciding on the fate of your soul.
You circle something or you don't and then you deal with whatever happens however you want.
