I think I will stick with the random searches, rather than walk around with all my personal information on a "human pet tag." These silly cards wouldn't have stopped the terrorists of 9/11. Most of them were frequent flyers with OK'd IDs in the first place.
Random searches and the rest of the security BS nearly caused my elderly mother a heart attack last time she came to visit. I doubt she'll ever be back to see me again.
There is a mountian of data the feds and others have about me. The only difference a positive ID will make is that they will be able to tell that my physical body matches the information they already have. Like they couldn't eventually figure that out anyway.
They've already logged my name as traveling in the airlines computers. My traveling privacy has already been abridged. An ID makes absolutely no difference, except I don't have to go through the usual anal exam to get on the plane.
I'll take the ID.
As for searches stopping 9/11. NOTHING will stop what they did on 9/11. You can kill someone with your fingers. The only thing that can bring safety is secure cockpits. And an ironclad policy that the aircrew doesn't come out no matter what happens in back. Problem solved.