The Wizard of Oz needed a machine to inspire confidence in his abilities. Bob Hirschfeld has the Internet. Mr. Hirschfeld is a disbarred Phoenix lawyer who cruises World Wide Web chat rooms, styling himself the Wizard of Laws and advertising Lexstrat, his new Web site that answers legal questions for $24.95 and up, payable by credit card.

As Mr. Hirschfeld tells it, his aggressive advocacy on behalf of fathers in custody disputes caused Arizona’s bar and judiciary to run him out of the profession on trumped-up charges.