It's easy to second guess the way people acted in a crisis. I've done it too, but it is foolish.
And, when talking about shutting down Virginia Tech University, the critics are wrong.
Imagine the following senario:
At 7:30 AM tomorrow morning, there is a shooting at the apartments in Gateway Mall. When SLCPD arrives, they find two dead bodies, one male and one female. According to initial reports from witnesses, the shooting was possibly the result of a domestic disturbance. And, it is hard to tell if it is a double homicide or a murder-suicide.
Because the gunman got away, Mayor Rocky Anderson and the Salt Lake City Police Department decide to lock down Salt Lake City from Downtown to the University, South Temple to I-80.
Then, when nobody else got shot, everybody would get pissed at Rocky.
That's exactly what people expected the President of Virginia Tech to do.
Maybe, if they had any indication of what would happen, sure.
But they didn't.
If, everythime a murderer got away from the crime scene we shut everything down, the economy would grind to a halt.