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This may prove to be one of the smartest decisions you ever made.

All you really need from Facebook are the email addresses of the people who sign up and want to contact you.

It's a bit like the old idea of a "change of email" forwarding service. People change email addresses, but there's nowhere to leave a forwarding address and you lose contact with them. It's also a bit like zabasearch which implemented a way to see if someone is trying to contact you.

Once you have those email addresses, you do not need Facebook. You are in contact, via email, with the people you want to be in contact with. You could set up your own private networks (startup hint). Advertisers are not invited to the party.

Without email, Facebook cannot exist. Zuckerberg's unusually popular password protected website relies on something very old: email addresses.

No email, no Facebook.