If you want to "have a nice discussion about it" you need to stop using extreme cases, and broad-brushing them as though they apply to every school.
As per our Sex Ed Curriculum... We wrote it ourselves (local pastors & youth pastors). Did this mean that "the condom lady" from Planned Parenthood was not allowed to teach? No, it doesn't. But it allowed me - and pastors like me - to be IN THE CLASSROOM FOR A WHOLE WEEK. We talked to the kids, we presented them information, we let them ask questions, we provided balanced views. We had captive audiences right in the school, for crying out loud!
I'm here to tell you that all these people who are screaming expletives about the Public Schools, and saying there is NOTHING that can be done are DEAD WRONG.
I've been in our public schools, I've been involved, I've made a difference.
We moved last year, and our daughter is now in an urban high school, with well over 2,000 students. She's doing GREAT. It's a GOOD school. As I write, she's sitting in the chair beside me, studying College-Bound Geometry. And she's a freshman.
In fact, just last fall, 3 students from that "evil" public high school got perfect scores on their ACT tests. Pardon the bluntness, but this is something that you will NOT have happen with home-schooled kids.