Remove the "Accepted Answer" feature from community wiki posts. Since the community votes for the best answers, the answer with the highest votes should be considered the answer. So let the votes do the talking.
Since this post was initially placed out there months ago, subjective questions are being removed at a growing rate. I don't think that having less "subjective" posts makes this idea go away, but it does reinforce the idea that "subjective" posts can't have an answer. It also reinforces the belief in the community for doing what is right via voting.