Not voting is acquiescence—the only way to protest is to register your choice.
As a third-party voter in a blue state, I didn't have to decide whether I should support a lesser evil, but I was still torn. I worked with Dan Vacek when I ran for governor with the Grassroots Party and I liked him, but of the parties that were sufficiently organized to get on the ballot, the Green's platform is closest to what I believe. So I did what anyone who values democracy should do and flipped a coin. Jill Stein won. That pleased me. I ended up voting for the Susan B. Anthony candidate.
Clinton fans are doing their best to appropriate Anthony, but here are a few quotes that suggest Anthony would've preferred Sanders and Stein.
on public education
Down-ballot, I went with Democrats and the tax raise for our schools. Minnesota's Democratic Party fused with the Farmer Labor Party long ago, and while much of the spirit of the FL has been lost, there's enough to make this a good state.
PS. Yes, that is a Captain America hoodie. He grew up a working class guy in New York during the Depression—he was either a Roosevelt Democrat or a red. There are two kinds of patriotism. I believe in the kind that says when you love the place you live, you work to make it better.