QUOTE (bigruss22 @ Dec 21, 2012 -> 09:18 AM)
Difficult in a high school setting? Sure.
In an elementary setting I bet that difficulty is much less.
EDIT: And I'm not saying this is going to stop every incident, but it'd be a plausible, good step forward.
Why stop at schools? Mass shootings happen everywhere. We'll need armed guards in churches, movie theaters, malls, sporting events, parks, libraries, and on public transit.