When I was younger (before the advent of the Web) parents used to always complain about how their teenager(s), especially girls, spent way too much time on the phone. Telephone companies would advertise how you could get a separate line, to make certain your teenage child wouldn't keep you from using your phone.

Nowadays, teenagers use instant messaging via AOL, MSN and Yahoo. And what do I hear from their parents? "I don't understand instant messaging. Why don't they just call the person and talk to them on the phone?"