I believe there should be another means other than e-mail for people. Even though I rely on a computer and internet for my living I don't believe it should be the only way people communicate. Also, there may be a medical condition why people don't use them. My MIL is 85, has had 3 strokes and 1 heart attack. The stroke damaged the part of her brain that can comprehend technical stuff. She can run a remote control but that is about it. If she gets an answering machine when calling someone she thinks it is a "live" person and cannot understand why they don't answer her when she starts talking. No amount of explaining can get her to comprehend.
So, in summary, I don't think people should be excluded just because they don't have the "in" thing.