The Huffington Post (Oct. 15) -- Users have some control over their newsfeed, with Facebook rolling out curation tools that allow you to "See More" updates from certain users and hide others. But these user capabilities aren't always easy to find. "While the levers exist, people don't use them because they're hidden," says Karrie Karahalios, an Illinois researcher who co-authored the "Uncovering Algorithms" paper.