[froggit]

Are these schools in Stalin's soviet union? One kid causes disorder so all kids must be purged to make sure there won't be another naughty child in the future?

Believe it or not, teachers (your sao-called "power figures" here) are generally not a bunch of untrained dumbshits unable to think of kids with more granularity than as the entire collective group making up a class. They have the skills and training to identify the sources of disruptions along with ample resources available for correcting them without calling forth damnation and hellfire on everything in a 5 mile radius. Hammers are awesome, but it's not all that hard to grab a scalpel when a situation calls for a scalpel.

[therein]

I had some great teachers, and some not so great ones. It didn't even take being in Stalin's Soviet Union to experience the whole spectrum.

Even the good ones at times resorted to those kind of measures. But it seems we agree that collective punishment is unfair.