Ill just say I have 4 children, eldest is a teenager and none of them have EVER given each other a black eye or got a black eye during play at home.
Definitely not saying it doesn't happen as im sure it does - but it is definitely not normal for the same children to have multiple black eyes in the past few months through accidental play
Same feelings here, it's not normal, IMO, for children their age (or any age) to get black eyes from everyday play/life in a residential setting, no matter how rustic, no matter their typical behavior and energy level, and more than once in several months, before then disappearing.
I'll take it even further and say, in addition to raising several children, looking after hundreds of kids throughout my lifetime in all types of situations (in home, outdoors, at camp, in classrooms), both professionally and casually:
Neither I or any of the parents, friends or coworkers I've known have ever seen a 4 to 6 year old child sustain that severe of an injury to the face to develop a black eye through innocent play, even in a crowded setting with big toys and play equipment and kids of different ages and genders and physical abilities.
It is so unusual, IMO, that added together with concerns about Lilly and Jack by school professionals a few months before they disappeared, really raises alarm bells about child safety in the home.
In retrospect, of course, not having known about the facial injuries before now, especially when added to DM proclaiming they were a "handful" and he had to do "everything" for them in some of the early videos in which he was speaking freely about it to MSM, IIRC, it's almost like he was setting up a "you know how it is" sort of narrative to explain away the injuries that resulted in black eyes on both children over time.
Yikes....
JMO