Parents need to remember they are in charge of the home. There is no reason a child/teen needs to have constant access to the internet or Facebook. Have the computer in a family area where you can see what is going on. Teens spend too much time isolated in their rooms with TV, computers etc.
And how do parents afford all of the kids to have cell phones--those things are expensive. Our kids used them when they were going somewhere so they could call home but they don't need them in the classroom.