Yes, Social Security numbers are supposedly widely available. However, it takes some work and possibly some money to find them. It is somewhat like locking a car. The lock will not stop a professional thief, but it will stop an amateur. I am a tax professional, and have worked with two individuals who had amateurs (friends or family) steal their SSNs, and then use those numbers for employment while claiming an exemption from withholding. The IRS came after the taxes, and it took years to convince them the SSNs had been stolen. Putting a SSN on an Eagle Scout application creates too much of a moral hazard.