You dont see it on their faces or even when they play. Kids are tough. People are tough. They wont let it get them down. They repress it. Pretend it doesnt exist. But it does exist. I compare it to the same way people adapt to difficult circumstances in life. I remember reading stories and watching movies about people in concentration camps and POW camps during WWII. They go on with their daily routine even though they are under constant threat of death by their oppressive captors.
Schools that use CP are an oppressive regime. Instead of machine guns and guard dogs they carry a paddle. It is still rule by threat of violence either way. It is a dictatorship using fear and intimidation to maintain order.