"Obligated to vote" is not how I'd put it, personally. Choosing not to vote is your right, but frequently the arguments I hear from people against doing so are things like "It doesn't make a difference, they're both liars" or "I don't follow politics". I don't find these reasons, on their own, to be particularly good reasons not to vote. It's the apathy that gets the choir singing. People are well within their rights to not vote, but my experience has been that the majority of people I've spoken with simply do not care to understand the impact that one candidate being elected over another may have on their lives, their family's lives. I find that irresponsible. Long story short, I support not voting insofar as the person not voting has given it some modicum of thoughtful consideration, and understands the ways in which the candidates, however terrible they might be, will affect our country if elected.