I have 2 teenagers. I'm terrified for them. As a teen mum my biggest worry when they were younger was teenage pregnancy, now I'm worried they are going to sterilise and mutilate themselves.
If I had girls, I'd be 10x more terrified. I think one good idea (in general, not just about all of this) is to encourage our children to think critically. There are lots of ways to help anyone develop better critical thinking skills. Yasmine Mohammed speaks about this quite often - how she only could leave her faith and the abuse she suffered because people helped her think things through by herself and she was able to come to her own conclusions. She wasn't able to hear 'God doesn't exist' or 'hell is a made-up concept' because she had been indoctrinated. She could, however, ponder questions such as 'If God exsits, why...?' or 'Why would a non-Muslim person who has done nothing but good in their lifetime go to hell?' etc. These types of questions helped her make up her own mind.
I think with kids it's entirely appropriate to ask them regularly about all sorts of things questions like:
How do you know this?
What's the evidence?
What would happen if you swapped X with Y? Would it still be true? Why/Why not?
Why do you think people believe X?
Why do you think people believe different things about X?
This is evidence A and this is evidence B. Which is stronger? Why?