I don't think you have anything to worry about. Security and diligence are important to protect your identity, but someone does not need to get it from your dealership. ALL information is easily accessible on the internet and through public documents.
If you are serious about identify theft then contact the SS administration and the credit managers (Experian, Equifax and Tranunion) and add account passwords. You can also get a membership to any of a dozen security monitors like lifelock.
scrubb