This issue is one of personal responsibility. It has nearly vanished in our litigious society. Guns are lethal weapons, but so too are cars, hammers, axes, and baseball bats.
The rebellion we must prepare for is not a foolhardy armed one against the US military and Govt agencies, but rather a rational and literate one against the 'excuse makers' and our ultra-liberal legislative and judicial systems. Laws are made for the public good. No public good is accrued when individuals are held unaccountable for the outcome of their actions.
In the case Kat has brought forth, the parents/guardians of the young boy should be prosecuted for reckless endangerment.