So in order to see the information they may or may not have on you they ask for your name, full address, last 4 ssn, date of birth, and email... if they didn't have any data on you before they do now.
Now you just gave them a unique user ID to tie it all together.
(IANAL.)
But I'm also surprised as many hacker newsers have submitted their info as it sounds. So, if hamfisted works, hamfist.