Getting the Names of Anonymous Subscribers

I've always found it interesting that you have to answer every question yourself (if you ask somebody else you have to decide whether you trust them, and to really do this you have to answer the question to see if they answer correctly). Fortunately, there are questions where this doesn't matter. One of those questions is "what's your name?"
Turn your anonymous users into subscribers you can greet personally — by asking them for their name.