Nowadays, students don't follow teacher instructions it is very strange thing can be seen in schools and you have observed. Parents should take responsibility for realizing their kids what is school and who is teacher obedient. I was most frightened Guy in the class because I was afraid of asking questions directly from teacher because If he mind he would punish me. Nowadays students happily asks non sense question to tease their teachers.
You too have definitely observed too. Students do not care or bother what happens next when they ask nonsense questions because they are not afraid anymore. Things have really changed a lot.