He suggests more subtle lies: using an alias on Facebook, lying about your birth date when forced to enter it, using disposable email addresses to sign up for one-time account.

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Do you really want to put online all of your family information, your surname, your date of birth, online on a site which people can view day in day out?

BBC: How safe is life online?

That agent would have requested your legal name as it appears on your passport, as well as your date of birth.

FORBES: Why I Hate Travel Agencies

Whether domestic or international, that agent is required to obtain your legal name so that it matches your legal document (used for identification purposes by TSA), as well as your date of birth.

FORBES: Why I Hate Travel Agencies

When you complete your profile or account information for a social networking site, they ask for personal information such as your date of birth, address, phone number and even your hometown or place of birth.

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Or one that asked for your date of birth in one place and your age in another, and then required you to sign your name over and over again (and also print it out each time)?

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Check your personal information for accuracy, including name, date of birth and Social Security Number.

FORBES: Magazine Article