It doesn't actually matter if you limit your likes.
From the article:
Like shadow profiles of people, Facebook can "infer a like" based on
other information it has about you, like what you read all over the
internet or what you do in apps where you log in with Facebook.
Yeah, I don't use FB login for anything else. I don't click FB Like buttons on other web sites. FB can't tell what you're reading on other web sites without your explicit action.
