I've recently realised I was upvoting comments (across various sites) that I agreed with and sometimes vice-versa, and I have started making a concrete effort to ensure that I upvote views I disagree with, if they add to the discussion.
I agree with the proposal of a one-week political moratorium here because I think that experiments can make good science. Let's also try to change the way we vote (and comment) for a week, by trying to ensure quality discourse is promoted, not just our views.
It's sometimes good for the soul to respect what you disagree with.