Author Mark Bauerlein aims to provoke in his new book, "The Dumbest Generation: How the Digital Age Stupefies Young Americans and Jeopardizes Our Future" (Tarcher/Penguin). Do you agree? Take a look at eight reasons the Emory University English professor gives to ''not trust anyone under 30'' -- see which you think is the best. Disagree, or have your own spin? Have your say on this message board. Or see if Bauerlein answered your question directly in a chat from Wednesday, May 14. 1. They make excellent "Jaywalking'' targetsBauerlein writes: "The ignorance is hard to believe ... It isn't enough to...