I just noticed this when helping someone I know create an account. Many of her Yahoo contacts were recommended without it asking for a Yahoo login (Ironic, eh? Facebook calls that criminal when other companies do it.).
It also found many of my friends whom she had never even heard of---I had even defriended a couple of them. I'm thinking that it's also recommending based on cookies/session or IP address---perhaps their logic is that a person living with me likely knows many of the people whom I know.
It also found many of my friends whom she had never even heard of---I had even defriended a couple of them. I'm thinking that it's also recommending based on cookies/session or IP address---perhaps their logic is that a person living with me likely knows many of the people whom I know.