There are some sites that I don't yet have 1,000 rep on (including meta), which means I cannot see the upvote/downvote breakdown.
There were some posts that I was curious about, so I pieced together my limited SQL skills to find out. This data can be up to a month old, but if I understand correctly, a similar thing could be done with the Stack Apps API to query real-time data.
What's the point of preventing people from seeing something if they can find it out anyway?