Cowlitzfisherman - I'm just too lazy to try to research just how illegal aliens manage to get drivers licenses without ssn's but will venture that some obscure exemption from section 666 allows the use of an "alien tax ID #" or some such thing.

For any conspiracy buffs out there, a search engine result for "title 42" and "section 666" located the following page: MARK OF THE BEAST -- 42 USC Sec. 666

Reccommended Reading - despite the wacky name.