Alice: Doesn't want to vote.
If we support Alice, then Alice has her preferences satisfied. There is no Bob here. There is also no dilemma of any kind. Obviously we should support Alice, because there is no reason not to. (Unless we hate Alice and want her to experience preference non-satisfaction, for some reason.)
False. Even if all things considered you prefer that Alice not be compelled to vote there are reasons to do so. Voting is a commons problem. Compulsory voting (or, "compulsory attendence of the voting booth at which point you can submit a valid vote or not as you please") can be considered analogous to taxation, and happens to be paid in time (approximately non-fungibly). If a country happens to get adequate voting outcomes purely from volunteers then that may be a desirable policy all things considered. However, compelling people to vote does not imply sadism. Merely a different solution to said commons problem.
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.