Being a Masternode owner is a responsibility, not a right. If you shirk your responsibilities and just want to sit back and watch the odd payment come in, you forfeit your right to complain. Masternode owners are an integral part of a healthy ecosystem. It is their job to maintain the health and well being of the network. This involves paying attention.
That position is not factually correct. There is no structural obligation for MN holders to vote. If there were, I would stop being a MN holder. There is an abstain option, and it is the option I will always use for reasons I've cited upthread.
This does not mean I think the system is bad or should be changed. It is a huge improvement over fiat-world, and I support it by MN acquisition as my means allow.
However, one of the unintended consequences of any effort to "get out the vote" is that it inevitably increases the number of people who will vote for the losing side, and who will as a result become disgruntled. Their level of discomfort is proportional to their fervour over the issue of the day - the more they cared (and lost), the more sour they become. Over time this leads to a lot of friction, as the community is beginning to notice. My approach allows me to step back from that kind of emotional friction and assess only whether the coin still has objective appeal, regardless of how it came to have its features. I'm not a person who votes, but I'm still a contented MN holder.
The meme "it's your duty to vote" originated in the political realm, where it is frequently the case that the choices offered have limited natural appeal to a voter. Hence the advice (in that realm) to "hold your nose and vote" or "find something you like and ignore the rest of the package". People who can't be coerced by the "duty" ploy are typically labelled apathetic (in that realm). I hope the DASH community decides not to import such practices from the political realm. Time will tell.
tl;dr There is no need to badger people to vote yea or nay. The system is structured with an abstain option and that is a good thing.