This has been happening for quite sometime. I believe those pages are sponsoring these advertisements, and essentially are showing that your friends had previously liked them.
You've unfortunately missed the point. The "Johnny Wonny" user never 'liked' the article/post about 2 Girls 1 Cup. He merely like the VICE page. Facebook is now deciding to show the post to all his friends with his name attached, without any mention to Johnny in any form.