Call Brady a “tech-no,” a member of a dwindling — some might say occasionally oppressed — minority who are resisting the worldwide movement to be constantly connected. They’re just saying no to the very technologies that increasingly are captivating most everybody else. Some tech-no’s shun e-mail. Others don’t use the Web or, like Brady, don’t even have a computer. Many avoid cellphones. In a few rare cases, people say no to just about all of it.