I downvote comments which I think don't add anything to the conversation. Lately I find myself downvoting comments which try to interject U.S. politics—of any

I downvote comments which I think don't add anything to the conversation. Lately I find myself downvoting comments which try to interject U.S. politics—of any ideological stripe—into discussions of non-political topics. I don't think the commentators are "breaking the rules," per se, but they aren't contributing positively. I'm sure they feel their political opinion is being suppressed, but my votes reflect that I come here for technical insights, not politics.