The "list of people who liked this post" list (when there is at least one "like") is too visible. It should be shown only on request (i.e. by clicking on a link to see the list of names) - not by default. The default should be no more than showing the number of "likes" that a post received
Otherwise, you end up with the "list of people who liked this message" becoming visually almost as important as the message itself