While I don't think it will directly help stop/capture/deture terrorists, it may have a beneficial side effect. Let me explain....

Yesterday I picked up the boarding passes at IAD for a vacation week in PHX. I got them at the airport on the way home from a quick 96 hour MR/biz trip (IAD/LAX/SEA/NRT/SIN/NRT/SEA/LAX/IAD) which had gone extremely smoothly with not a single "extra search" or delay at any customs point. Examining the boarding passes I noticed that one of us had been selected for extra screaning. OUR SEVEN YEAR OLD SON! When we got (back) to the airport later that day, Benjamin went through the magetometer handed his BP and school ID to the TSA agent, who looked at, looked at me says "your kidding...", I said "I know...pretty crazy", he shakes his head and says.... "ok stand here... which is your back pack...." The whole routine.

So if at least using the year of birth avoids silly situations like this, it would be better. One might fudge the date by a couple of years, or give the wrong month/day, but some one who puts down that they are 7 years old to avoid screening isn't going to get through when they present their drivers license for ID.