This is my shame. I did this some years ago and discovered that my phone contacts had been uploaded to Faecebook. I apologised to all my contacts and closed the account. Too late though.
So it's worth knowing that whilst you may avoid faecebook you can still be shat on and let down by any so called friends that still have an account and feed the depraved animal.
Lucky that I only know one die-hard user who is still defiantly fucking the rest of us over. It's easy to get rid of faecebook and you won't miss it. There is always a much better way to do whatever you think you need it for if you are not a lazy-arsed bastard.