Re: knowing and forgetting
"knowing your IP address allows us to send the Like button to your browser..."
Facebook don't need to know anyone's IP address to deliver anything at all.
They don't even need to know the IP address of the server delivering the button as an include in a page.
They just have to make the button available as a resource upon request by a server including it in a page.
The only reason Fuckerborg said that was because he was banking on nobody on the committee knowing how the Web actually works.