No one is too old to be computer literate. Think of the world wide web like a really wide space, and you're able to travel at the speed of light..sightseeing, and communicating with humans along the way is not a bad thing.
It's only real bad when you have no one in real life to talk to on a real personal level. It's a great big Monopoly Game. Everyone wants a part of the best real estate on the web, and from my most recent experience, it happens to be MySpace, Twitter, and Facebook at this time. No matter how old.