Black-Eyed Kids

Let's get this paranormal community started with a personal favorite of mine.

Around two years ago before series 11 of Doctor Who started I wrote a post about a villain (other than myself) I would like to see on Doctor Who: the black-eyed kids.

Wikipedia describes black-eyed children as:

Black-eyed children (or black-eyed kids) are a contemporary legend of supposed paranormal creatures that resemble children between the ages of 6 and 16 with pale skin and black eyes ...

I personally haven't decided one way or the other whether BEKs are a real phenomenon or an urban legend. If real I would rather vicariously study reports than have a firsthand experience. If legend the BEK reports have an affect on my imagination like few other paranormal topics can. Part of me really wants black-eyed children to not exist at all.

If a true phenomenon the main question is: What is the nature of the BEKs? Alien? Vampiric? Demonic? The latter seems to fit the reports about black-eyed children having an unsettling presence. The "alien" label would also seem to apply because their appearance and mannerism is said to be more humanoid than human.