Selective standards are earned.
So the actions of a few are good enough to hold others--even those with only a passing similarity to the few--to the same standard?
Who else would you apply these "standards" to and on what basis?
This was hardly pre-emptive. The student presented with a device that was odd and he was told to not plug it in but he did it anyway.
Well, no. He went to a few different classrooms and on his fourth or fifth ran into an English teacher (because of course) who was befuddled by the clock. The teachers knew he didn't have a bomb. The cops knew he didn't have a bomb. Which begs the question: Why did these imbeciles call the cops in the first place?