Better suggestion - stop politicking and answer the question or move on.
Sure if the question is badly made then downvote it. Whilst downvote for disagreement is encouraged here (by the site owners) you can't "disagree" with a question, that's nonsensical.
To answer your question: "how can you disagree with a question"; well, you can downvote a question that is loaded (with some kind of ignorant agenda) or a question that is so blisteringly ignorant by itself that it is plain and obvious that the commenter didn't read the article posted, even a skim-read.
I generally post around 9am and 12pm US east coast time. When I take a substantial negative hit it's around noon or 3pm on the East coast. There's a baseline amount of up-votes and down-votes (with up-votes dominating) that seems to roughly correlate with the hours most people are awake in the US and Europe.
Someday I'm going to publish a write-up here.