I feel concerned by the current conversation as it start to going round (I feel) you talk about age limit from the first page.
Many things have been said. I think you are trying to convince one-another. Well... it doesn't seem to work, then have a poll, vote for IRON's position about minimum age required to purchase weapons ! ^^
Or I may try to show why you doesn't succed to convice one-another ? With math !
"During the 2013–14 school year, colleges and universities are expected to award
943,000 associate’s degrees;
1.8 million bachelor's degrees;
778,000 master'sdegrees;
177,000 doctor's degrees"
total : 3,7 million person each years.
4 killing spree a year (according to a post here)
So : there ar less than 00.00 % of people causing a killing spree as teenage or young adult.
I would say that a probability of 00.00001% (precisely) isn't a porbability that can count as a cause.
the problem isn't age.
As far as killing spree doesn't happen at office (as far as I know), It might be due to certain conditions directed linked to spécific persons in their environment.
conditions that would have more than 00.00% chances to be the issue.
Like treatment of other students, family environment, or other stuffs. There are enough case to have good statistics.
Unfortunately everything has ended when we know we should have studied the case : so no mors statistics. (or complete ones)
And ! If any cause or a spécific profile would have been found with those statistics, they would certainly concern private life or things that wouldn't be lawable (does that word exist ?) without higly restraining freedom or private life !