Excuse #3: I'm afraid of Cyber-Stalkers
In this day and age, this is understandable. But - they don't know who you are just because you put your picture online. You would actually need to give them identifying information to find you. This is not a reason to hide your great smile - instead hide your name, phone number and address. Don't give this information out until you are comfortable with who is on the receiving end. In fact, many of the dating sites offer an Anonymous Phone Call feature so you can connect while still maintaining anonymity.