Ever wanted to know more about the person you are chatting with? Beware, internet is not being safe now a days. You must know the background of that person before being familiar with them. You must never share your personal information to them. Not only to them, but also to the web site forms.
Never fill up the form randomly without knowing about the website. If you want your email address to be private then you must be aware about sharing your personal information like your home address, telephone number, etc.
Why? Because, not only Google but everyone is watching you. Google is the best method to search everything about your email address and username. But If you really want to know about ther person’s email address then I have a good website for you.