The Freedom to Not Vote for Nobody

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I've been yelled at multiple times by family members for not voting in the U.S. elections. They say that I need to exercise my right to vote. I remember talking to an older gentleman on my way to Libertador (a small city in Jujuy) and him telling me how he hasn't voted in the Argentine elections in over 20 years, and hasn't gone to jail because of it! He couldn't really tell me how he got away with that though.

I can argue that I am either exercising my right to vote, or enjoying the freedom to not have to vote for Nobody.