Tomek Kott is so stubborn about not joining his friends -- in truth, nearly his entire generation -- on any social networking site that his wife launched a mini-crusade against him. Exploiting a tactic surely befitting our times, she whipped up a Facebook group last year called "Tomek Kott Must Join Facebook."

So far, it hasn't worked. Her husband, a 25-year-old physics graduate student who considers social networking a time-wasting cesspool of pseudo-communication, remains blithely unconnected.

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Pew researchers point to a new but very small study they conducted to show that resisters and adopters 18 to 29 have demographic differences: Social networkers are more likely to have an annual income of $75,000 or more, and nonusers are more likely to have only a high school education.

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