People search dating
With whatever information in your hands (user name, phone number, email address, occupation), you can come up with results from a search here.Google lets people choose who they share information with and who can view them though.On the search box type the name of the person you are looking for and click the button that says search profile.
Yahoo messenger allows instant messaging and internet calls.
You will see all the sites or places the email address was used.
It will then pull up all details on the profile for you to view.
Of course there are passwords that we use so as to be the only ones to log in to the sites and email addresses.
This data though can be used by people to search for us online.