Homeschoolers will have to make that decision when the time comes.
My wife and I found a Christian school with a staff we trusted and watched closely until the children became of age and could make their own decisions. We allowed them to attend public schools and eventually go on to colleges and careers of their choice.
If the family spiritual bonds are strong enough and the children are raised in the admonition of the Lord, they will have the amour they need to survive the temptations of the world when they become adults.
Spend time with your family, share meals, and answer their questions. Always teach them where two or more are gathered in HIS name, HE is there among them.
Introduce them to the Lord and his teachings and why you believe as you do. Don't force them to make decisions they are unprepared to make at an early age.
Ask them about their friends outside the family. Pay attention to who is influencing them and in what way.
Yes, we would have liked to have home schooled them, but this is where the Lord led us and we followed. Your beliefs may be different.