Online dating is suppose to be anonymous.  And, if you fill out your profile wisely, it will be. However, when the online dating service asks for your name, some people put in their first and last name.

Now, if you are not concerned with being anonymous, this is fine.  However, if you are concerned about privacy, this is not good because now the whole world knows who you are.

While this may seem to be common sense, I have seen many profiles where women listed their first and last names.