Currently, we cannot like threads from the thread listing, What's New? page or Recent Activity. If we could like threads from the thread listing and What's New page, including posts and profile posts in Recent Activity then user activity would definitely go up. Being able to like anything that can be rated in Recent Activity is a feature that comes standard on Facebook. On Xenforo, unless we are directly inside a thread or on someone's profile page, we are only able to view recent content, not like (or reply, but I took care of that).