Don't buy your children web cams for their PC's.
Remove the built in web-cams that come with laptops.
Try to get a cell phone that has no camera in it, or one that has been removed.
Let your child know that you will be monitoring the monthly statement and check all the phone numbers incoming and outgoing. As long as it's just their normal friends, no problem. Any older people, they lose their cell phone. If they don't like it, no cell phone.
Problem solved.
That's what I plan to do when I have children, anyway.

Reply With Quote