[unixsheikh]

I'm perhaps going to hit a soft spot here, but parents need to take serious responsibility for their children.

Home school the children!

Take control of the Internet (firewall and DNS) and don't allow access to social media or a smart phone until appropriate age.

Teach the children about these problematic issues so they actually understands why they can't have free access to a smart phone, and what's really bad about the Internet. Make them understand these issues!

Make contact to other people who do the same and let the children's social contacts be with like minded people in real life.

We, and several other families, have done that, and are still doing it, with great success.

[saagarjha]

I’m not sure isolating your children from the world is necessarily the only response, or even an appropriate one.

[unixsheikh]

It has nothing to do with isolation from the world, it's protection. The children still have lots of friends.