I just asked the question on Reddit why there were kids under 13 years old there and got downvoted to hell. But it's a serious question. Were these kids inside or outside the auditorium? Outside the theatre? It has serious implications for the parents/guardians and the staff. Did they let underage kids in? Or were they outside the auditorium just having drinks or something. It needs answers.
Yes, there doesn't need to be answers at all, they have a sensible ratings system, where by kids who can see the film on tv any time they want, can also go to the cinema when accompanied by a parent/guardian who gets to choose what their child can see.
Likewise, premiers at 12am is a publicity stunt that cinemas/studios needs to think about, the guy could obviously just as easily have walked into a midday showing of Bambi and shot kids so not sure why you think these answers would change anything?
Ah right. So it's strongly advised but not enforced. That's pretty shonky to be honest. And who would really bring their 4 month old baby into a midnight screening of a violent film? Or 6 year old for that matter.
Likewise, seriously what has 12am got to do with anything. Every kid on earth has stayed up late for some special occasion or another, an ecplise, a sighting of a planet, comets.
http://www.hollywood.com/news/Record_Breaking_Midnight_Screenings_of_Harry_Potter_7_Pt_2/7817823
LOADS of kids went to midnight showings of Harry Potter, and loads of kids went to the UK midnight screenings. As i said before, someone could have walked into any time screening of ANY film and done this, or walked into a school, or a starbucks, or a supermarket, anything, should kids never be allowed out because a psycho might kill them? Is there a higher incidence of spree killings in cinema's or after midnight?