[WayneS]

That change would likely be made without much public dissent, he added.

“The public sector knows an astonishing amount about us, and we accept it, provided we are given social welfare in return,” he said. …

I cannot even imagine thinking something like that, never mind actually saying it.

[Bartholomew Roberts]

In Sweden, PersonNumbers are common knowledge. I believe even available on government databases accessible by the public. The number is your birth day, month, year - and your birth in order of everyone who was born on that day. (If you were the thirteenth kid born on Jan 1, 2000 your number is roughly 0101200000013.)

It would be very very easy to append that number to yourFacebook record by the company. Especially if you’ve already given them your birthdate so they can remind all your friends!

It wouldn’t take any effort at all!!!