Some fella on R2 today was saying that he wanted to watch a live something or other from Cheltenham, so in order to see it, he signed up to FB. He gave them only his name, gender, date of birth and email address - nothing more..........the following day, he had dozens, literally dozens, of emails - people you may know, pages you may like, groups you may be interested in etc etc..............how the f*** do they get that from those very minimal of details ?