Oh, man, yes. This, all the way. That happened to me in a quest recently. I spent a while considering the options and their ramifications, worked out how it would affect the goals of the quest, and voted accordingly. Like, within sixty seconds, the next guy came along and just flat out said, "That's the most boring option, the other ones have fun drama" and voted for every other option, nullifying the vote I just cast.
Yeah, I was pissed. That's not engaging in a quest in good faith and having an honest difference of opinion, that's being a child and setting things on fire to giggle at the flames. If you're just looking for a fun read and can't take the quest aspect of this seriously, well, the User Fiction forum is over there, don't let the door hit ya.