Real ID seem just a sensible measure, and a reasonable one, to winnow out those with evil intent who are in the country to do us harm, or to break laws with organized underground cross-border criminal activity.  It`s an I.D. card right?  Just like we had in the military? and on our current driving and flying license information? I think it will improve our safety against terrorist nutjobs who smoke rope in the hills, schooled in madrassas paid for with Saudi oil money. Schooled literally to want to cut the throats of American and all other "infidels" and "apostates" and dream of flying into buildings.
 I would guess many of us have put similar information about ourselves on the internet already,..  Ancestry.com for example. It would be nice to know, and feel re-assured everybody on the plane has been run through a system designed to help catch the bad guys. To not take reasonable measures like an ID would invite more terror here. It`s a small price to pay..in my old humble opinion.