Which is Worse: Pedophile Teachers or Insane Gunmen?

From the LA Times today:

Behind a locked classroom door, a Los Angeles third-grade teacher purportedly committed lewd acts against students. The charges spurred demands for classrooms to remain open during the school day.

But after the shooting deaths of 20 first-graders in Connecticut last month, calls were made to keep classrooms locked.

The intent of both efforts is to keep students safe. But as school districts nationwide examine their security measures following the Newtown, Conn., massacre, the question of locked versus unlocked classroom doors is in debate. Should teachers and administrators use their secured doors as a shield from an outside danger? Or does a locked door conceal a potential danger inside?

I really hate living in the 21st century sometimes.