I purposefully didn't put a "barf alert" because my purpose was discussion and digging out any genuine facts that might be hiding in here. A "barf alert" is (IMO) more of a signal to "pile on" than to discuss.
Personally, as someone interested in guns, I'm also highly interested in gun safety. Specifically: how can I make absolutely certain that having a gun(s) in my home will make for a MORE safe environment for my kids, rather than a LESS safe environment.
I suspect in the end that ALL statistics are of only limited value. Not ONE of us precisely matches the "AVERAGE PROFILE" of a group in a study. The REAL question is: given MY family and their personalities, MY situation, MY etc., etc., what is appropriate.
We have some friends with a teenage son who is just a hard-to-control lunatic, and has been that way since birth. NO WAY would I have a gun of any kind in that family UNLESS that particular son's access could be absolutely and permanently barred. If there's any way he could get ahold of the gun safe combination, forget it.
On the other hand, there are 8-year-olds who, given appropriate TRAINING, SUPERVISION, and PRACTICE, I wouldn't hesitate to trust with ready access to a fully loaded submachine gun...