Is this just being cautious or an overreaction to an unverified threat?

Eight Montgomery County schools were in lock-down Wednesday morning after an unverified threat made at a school bus stop, a school spokeswoman said.

Montgomery County schools spokeswoman Kate Harrison said eight schools, including elementary and high schools, were placed on a "Code Blue" alert after the threat.

Code Blue means students must remain where they are in the school, Harrison said.

Since when did this become a good idea? When their safety is threatened the school's reaction is to make all the children stay where they are instead of seeking shelter.

It's a rabbit like response. If I don't move, he won't see me. And if a killer really were on the loose all they'd have to do is go room to room.