Demeter
If the idea was to ensure that children would be outed for their sexual forays, harassed, shamed, punished, beaten or killed for their sexual exuberance, then DITTO.
There will be cases in which this will happen. I only survived my parents discovering when I was 13 that incestuous rape had left me pregnant because the torture they put me through caused a miscarriage before I had to swallow the packet of pills they had got for me. I was left in no doubt that if I did not co-operate and swallow the pills, I would have a much less pleasant death. The sad part was, I adored my family, and believed it was quite right that I should die to prevent anyone from discovering what my 4 older brothers had been doing and turning against them for it.
To all the good parents here who would want to know if their daughter is pregnant, just keep communicating with them about all the little things in life. Never let it show if you're shocked by anything, if they tell you about indulging in behaviour that you don't approve of, use subtle ways to encourage them to think about just who they really want to be and how they want to behave. Make sure you know who their friends are and what's important to them, make sure they know that you love them.
Forcing a child to tell solves nothing, but being there for them through all the silly and petty issues that teenagers find so unedurable gives them a lifeline that is always there waiting to be grabbed when they need it.
A few years ago, my 11 year old granddaughter, a stubborn hothead who has always had a habit of ringing me to discuss things when she has behaved really badly, confided in me that she was addicted to cybering with strangers on the internet. We had a long discussion about sex and relationships and hormones and the feelings girls can get, but I think the clincher that really made her determined to stop was my boyfriend talking to her about the fact that he would never have done that lightly with me, because he respects me, and explaining about the need for friendship and respect, and how she deserved those things.
A discussion like that is only possible if you have put the groundwork in, chatting, caring, sharing, and being there for them. Every child needs to know their parents really know them and accept them as they are, without that, the belief that teenagers go through that they are smart and their parents are old irrelevant stupids will never be overcome.
Btw, my darling grandaughter has real friends on the internet now, girls she knows IRL as well, and no longer acts in a secretive way at the computer.