Madoka: Uses logic and direct examples
It's super effective
She makes a fantastic point. If there's a debate team I hope I hope she's on it. I would have also asked, "so one of our best friends got a BF, would you rather sit around repeating what the teacher's say to scare us or ask her about it?"
I do think it's really unfortunate that it's the adults around them encouraging these misunderstandings was just depressing. The chapter with their, I assume homeroom teacher, essentially fear mongering about how their lives will be over if their grades ever slip and using the students attending chidori as an example probably without knowing a single one was just depressing. I'd be really curious to know what the suicide rate is at that school specifically and this could very easily be an entirely different story if that's the mentality enforced. It's also unfortunately a mentality I know isn't completely fictional especially within Japan (how Japanese society can be so hyper competitive and yet homogenous and discouraging to individuality I do not understand; like they're on both extremes). It's really sad when children's role models enforce such negative doctrines, and I really don't know how they expect to produce successful citizens out of their students if they're all so willing to believe rumors and concerned with external appearances.