I suggest that more like the parents need to learn how to control a 10 yr old child, how to raise a child!
10 year's old with tantrums... it sounds like serious failure of parents.
I do not agree that child must be protected from any info on public TV - but it must go along with parents comments, education and discussions.
I was working in police when my children were that age, and of course, many crimes, including murders, were discussed at home, and no ban on any TV thing - but we were discussing things all the time, and I would not say that any of my children had such "side effects" like this child.
I'm really happy with my children now (youngest is 23) and they all have grown to be responsible members of society, because they had seen real life and as children they took TV as source of information - even movies.
I had not had a gun as if you have a gun, you must be ready to use it, and I am not, and the same rules I teached to my children... No silly games with toy guns, they had a real bow with arrows, and strong lessons for safety in archery.
All i see here is that parents need a serious counseling on child rising. They remain me owners of some small dog laughing when their dog is acting agressive - he/she is so braaaaave! Try the same with GSD, for example, and you will be in a big trouble!