The issue (to me) really seems to be that a company is using images they do not own, that depict people's children (who cannot legally consent to their pictures being used or any other contract), for their own profit.
Regardless of if this is Facebook or anyone else it seems like there is an issue with the company claiming the right to use other peoples images for advertisements.
I seem to remember a big flap about Instagram claiming they own the rights to peoples photos in the recent past. In this case it seems like there is the additional issue of the photos picturing people's children.
Edit: I understand putting the text "so and so Likes this company" next to something if they actually 'liked' it. But the article implies that they are using the person's image in a custom advertisement in the feed.