I completely understand social networking isn't for everyone. I know there are people who do not want anything to do with digital social contact. That is cool, I don't want to garden. No amount of grandiose jibba-jabba on the merits of gardening will make me want to garden. It's just the way it is. Congrats to the people who like it. I wish you and your spade well. I see the correlation.
When I'm around such a person, I attempt to keep my social networking piety from seeping into the conversation. On a few occasions, the topic came up and I've noticed the responses are exactly the same.
"I don't want to know what you had for lunch!"
Seriously? I follow a lot of people on Twitter and I can say that the majority of them are not about lunch. (I can't deny that there are some, but at least those that I follow, they are few and far between.) Please, lets change the talking point up. If your saying the sentence above because you find tweets to be pointless then just say:
"I find most tweets to be pointless."
Honest and to the point. Maybe you're saying the former sentence because you don't "get" Twitter and don't want to learn. Then I could suggest:
"I really don't understand the hubbub around Twitter and I don't have the time (desire/curiosity/need) to figure it out."
I didn't expect this to turn into a full blog post, but I'm getting tired of having to explain that Twitter isn't all about lunches. You either get it or you don't. Just embrace whichever camp you fall into.