From the Columbus Dispatch:

Information on [Joe “the Plumber”] Wurzelbacher was accessed by accounts assigned to the office of Ohio Attorney General Nancy H. Rogers, the Cuyahoga County Child Support Enforcement Agency and the Toledo Police Department.

The security of information about you in government databases is contingent on you keeping your head down. Something to keep in mind when advocates for the REAL ID Act (national ID program) and the E‑Verify national background check system come a‑calling.