No way in hell would I ever consider something like that. I wouldn’t even pierce my daughter’s ears, simply because it’s her body and not my choice. There is no way that parents should be able to alter their child’s body to that degree, reversible or not.
As everyone else said, it boils down to parenting. Teach your children yourself and if you don’t like the education their school offers, send them to a different school. Or just teach them what the school didn’t.
The fact is, people are sexual creatures, especially after puberty. Sometimes, no matter how much parenting or education is given, shit happens. Despite the fact that teens are having babies, that doesn’t give anyone the right, parents or not, to alter a female’s natural reproductive system.
Things do go wrong. Imagine someone’s daughter, grown and ready to start a family, only to realize that, whoops, they can’t reverse what was done. And her parents did it to her. I know that if something like that were to happen to me, I would have no problem completely disowning my parents and even suing the shit out of them.