Ah! You're voting "present".
I don't like the guy my sister married, but I went to her wedding and wished them well.
Do you see how you can vote to acknowledge a freedom even if the person uses it to do something you don't like. It's the price of living in a free country. People will do things you consider wrong, a sin, or stupid. But they have the right to do so. Get it? What is the source of your right to make that determination for them?