I used to keep my cell phone on all day on my desk, when my kids were at home; it's notoriously difficult to reach teachers and so I would get a lot of "can you pick me ?" calls if they wanted to stay after school. I would IM my husband if I needed to communicate quickly with him during the day, but I would have to do it sneakily, so the kids wouldn't see, or wait until lunch. Last spring, when i was subbing, my son called me from Iraq on my cell! My colleague next door was absent and there was no sub. I was trying to teach 2 classes and make sure chaos didn't break out and talk to him. I felt bad, but finally I said, 'gotta go."
Like Shootingstar, my non use of these things really has to do with the fact that I don't feel the need to be so connected to everyone I know every minute. One of my friends texts a lot; she is constantly texting her kids who are college aged. I have a good relationship with my sons and I am pretty sure they don't want me texting them. It's intrusive. I like to keep the different spheres of my life separate. I find that since I am not working now, I rarely turn my cell on, which has made a couple of people mad when they tried to reach me, but hey, they eventually called me at home. I know I could learn to use these things, but I don't want to. I told my husband that I could curl up in a little garret with my books and a computer for the Internet and I'd be fine. I wouldn't need any other electronic stuff.