"Teens fleeing facebook because old people use it and it isn't cool" is dumb. Teens know their parents find ways to spy on them and they have no desire to make it easier for them to do so. Parents "know" about the facebook and such, so they "monitor" what their kids do there. So the kids find places that are harder to monitor. It isn't complicated.
Yes I know not all parents monitor their teens so closely, but some do.
