As a statistician, I approach it this way - what is the probability that your vote will make an appreciable difference in the elections? Since our governmental system doesn't utilize proportional representation, especially when it comes to the presidential election, the probabilities are incomprehensibly small that any individual's vote will "count" in any appreciable sense. In other words, abstention may be a reasonable solution for individuals. GD gives the option of abstention to Christians, but not, seemingly, to Americans in general, who "should vote." Rather, I think that's a perfectly American solution too.
Of course, some may argue that if
everyone abstained, we wouldn't have a democracy. However, it will never be the case that this sort of argument wins over so many people that the phenomenon will become problematic. If yesterday's Superbowl viewership numbers are any indication, the public at large will always throw their (sometimes very zealous) support into contests, even when their support has no effect on the outcome. Let's also keep in mind that if everybody were a fireman, we wouldn't have any teachers, but that's no argument against firemen.
A different sort of argument is that abstention is democratic apostasy, since voting is portrayed not only as a right but also a duty; e.g. GrungeDiva's first paragraph. I have two responses. First, abstention itself can be an exercise of the right. Suppose I asked you whether you'd like to be shot in the foot or hand. The most "democratic" response, I wager, is not to pick one or even suggest your more acceptable ear as a write-in.
For different individuals, there may be compelling reasons to dislike the current system, not merely the politicians who inhabit it, and
any sort of vote may be seen as consent not just to the politician, but to the system at large. Abstention can be, and historically has sometimes been, seen as a protest vote. I think about those parliaments who have been presented with two false choices and choose to sit in protest until they're given an actual choice.
Second, I agree that our forebears deserve respect, but they in no way obligate an individual to utilize the rights won. To take the idea to its extreme, I am thankful for the folks at Stonewall and Perry of Perry v. Schwarzenegger, but I didn't
have to get married to show my respect for their personal sacrifices. To be honest, this sort of approach reeks of emotional manipulation. I heard it a lot during the last election cycle, that if I voted for Candidate X, then I was defiling the memories and sacrifices of Group Y, etc. Not hardly. Nobody's sacrifices obligate me to exercise the rights they won for me. Unthankful? No. Democratic and self-determining.
I would also caution folks against one-issue voting. More often than not, when a politician expresses a view that a voter finds conclusive, it is not because of any deeply-held belief, but because it splits the electorate along a convenient line. Especially as believers, you'll be under this sort of pressure. Individuals should resist being compelled by this sort of manipulation. Again, as a statistician, I recognize that politicians are more keenly statistical than ideological.
Bierce said:
Suffrage, noun. Expression of opinion by means of a ballot. The right of suffrage (which is held to be both a privilege and a duty) means, as commonly interpreted, the right to vote for the man of another man's choice, and is highly prized.