Stranger danger

To add to yesterday's panic about the criminal at large, I discovered that the teachers all walked the kids home! I wondered why there was no one in the staffroom after my last class and found out whey when they all returned to the school with the school safety sashes around them and carrying magnetic signs to the same effect which they had stuck on the front of their cars as they patrolled the streets which the kids walk home. I find it bizarre to have such a reaction. But it doesn't just happen here of course. Whenever something like this happens people freak out and start being ultra cautious before relaxing back to their previous behaviours. I don't understand how the risk of something bad happening is increased because something bad happened yesterday. If they feel compelled to watch the kids home from school today, why not tomorrow too? Is there some kind of rule that prevents potential kidnappers from loitering in the same area longer than 2 days? Everyday of the year offers the same risk of kidnapping surely? Either you deem the area safe enough for the kids to walk alone or you don't, you can't pick certain days which are more dangerous than others. People are weird.