Entering your date of birth no more opens you up to being a victim of a scam than the mere entering of your name. Then, your phone Number alone allows them to access your location (address to your name, house number, street, city and state). And do you recall, every one of your job applications, Doctor's patient files contain the same information, and that includes your DOB, plus your Social Security No. The only thing entering my birthdate does is to establish that I'm over 18.
Jim